Note

This manual is for LibreCAD’s stable release version 2.2.0.

Drawing Tools

The drawing tools are used to create and modify entities such as lines, circles, etc. in a drawing. Commands can be selected from the menu, toolbars or entered via the command line. Right-click anywhere in the drawing window to display a popup menu showing the history of commands launched from the menus or the toolbars with the latest command being on top of the list. Note that the command line input is not shown.

Several drawing tools require additional parameters and will provide prompts on the Tool Options toolbar. This toolbar should always be enabled. If the tool options do not appear, from the menu select Widgets -> Toolbar -> and enable Tool Options. If using the command line, the same tool options are available via the toolbar or the command line. The tools that have options are shown in the table below.

Line

Tool

Icon

Command

Description

2 points

icon01

l, li, line

Draw a line between two assigned points.

Tool Options:
tlopt14

Angle

icon02

Draw a line from an assigned point defining the start, middle or end of the line and with an assigned length and angle.

Tool Options:
tlopt07

Horizontal

icon03

hor, horizontal

Draw a horizontal line from an assigned point defining the start, middle or end of the line and with an assigned length.

Tool Options:
tlopt10

Vertical

icon04

ver, vertical

Draw a vertical line from an assigned point defining the start, middle or end of the line and with an assigned length.

Tool Options:
tlopt10

Rectangle

icon06

rec, rect, rectangle

Draw a rectangle by assigning the points of two diagonally opposite corners.

Parallel through point

icon07

pp, ptp

Draw a given number of lines parallel to a selected existing line through an assigned point.

Tool Options:
tlopt13

Parallel

icon08

o, pa, offset, parallel

Draw a given number of lines parallel to a selected existing line with a given distance between lines.

Tool Options:
tlopt12

Bisector

icon09

bi, bisect

Draw a given number of lines bisecting two existing non-parallel lines (e.g. at an angle to each other with or without a common point).
Tool Options:
tlopt09

Tangent (P,C)

icon10

tanpc, tangentpc

Draw a line from an assigned point tangent to an existing circle.

Tangent (C,C)

icon11

Draw a line tangent to two existing circles.

Tangent Orthogonal

icon12

Draw a line tangent to an existing circle and perpendicular to an existing line.

Orthogonal

icon13

ortho, perp

Draw a line of a given length perpendicular to an existing line placing the centre at an assigned point.

Tool Options:
tlopt11

Relative Angle

icon14

Draw a line with a given length and at a given angle relative to an existing line placing the centre of the line at an assigned point.

Tool Options:
tlopt08

Polygon (Cen,Cor)

icon15

pl, polyline

Draw a polygon with a given number of sides assigning the centre point and point of one vertex.

Tool Options:
tlopt15

Polygon (Cen,Tan)

icon16

Draw a polygon with a given number of sides assigning the centre point and point of the centre of one side.

Tool Options:
tlopt15

Polygon (Cor,Cor)

icon17

poly2, polygon2v

Draw a polygon with a given number of sides assigning the two points of one side.

Tool Options:
tlopt15

Circle

Tool

Icon

Command

Description

Centre, Point

icon18

ci, circle

Draw a circle with a given radius by assigning a centre point and a point on the circumference.

2 Points

icon20

c2, circle2

Draw a circle with a given diameter by assigning two opposite points on the circumference.

2 Points, Radius

icon21

Draw a circle with two points on the circumference and with an assigned radius.

Tool Options:
tlopt01

3 Points

icon22

c3, circle3

Draw a circle assigning three points on the circumference.

Centre, Radius

icon19

circlecr

Draw a circle with a given radius centred at an assigned point on the circumference.

Tool Options:
tlopt01

Tangential, 2 Circles, 1 Point

icon26

Draw a circle tangential to two existing circles and assigning a centre point to establish the radius.

Tangential, 2 Points

icon27

Draw a circle tangential to an existing circle and define the diameter and placement by assigning two points on the circumference.

Tangential, 2 Circles, Radius

icon28

Draw a circle tangential to two existing circles with a given radius.

Tool Options:
tlopt01

Tangential, 3 Circles

icon29

ct3, tan3

Draw a circle tangential to three existing circles and/or lines.

Curve

Tool

Icon

Command

Description

Center, Point, Angles

icon30

Draw a curve (arc) with a given radius defined by a center point and a point on the circumference, the direction of rotation (clockwise or counter-clockwise), a point defining the start position of the arc and a point defining the end position of the arc.

Tool Options:
tlopt03

3 Points

icon32

a, ar, arc

Draw a curve (arc) by assigning three points on the circumference of the arc defining the start position, a point on the circumference and end position of the arc.

Arc Tangential

icon34

Draw a curve (arc) tangential to the end of an existing line segment with a defined radius or angle (deg).

Tool Options:
tlopt02
or
tlopt04

Spline

icon41

spl, spline

Draw an open or closed spline (curve) by assigning control points and a given degree of freedom (1 - 3).

Tool Options:
tlopt21

Spline through points

icon42

stp, spline2

Draw an open or closed spline (curve) by defining points on the spline.

Tool Options:
tlopt22

Ellipse Arc (Axis)

icon36

N/A

Freehand Line

icon05

fhl, free

Draw a non-geometric line.

Ellipse

Tool

Icon

Command

Description

Ellipse (Axis)

icon35

Draw an ellipse by assigning a centre point, a point on the circumference of major access and a point on the circumference the minor access.

Ellipse Foci Point

icon37

Draw an ellipse by assigning two foci points and a point on the circumference.

Ellipse 4 Point

icon38

Draw an ellipse assigning four points on the circumference.

Ellipse Center and 3 Points

icon39

Draw an ellipse by assigning a centre point three points on the circumference.

Ellipse Inscribed

icon40

ei, ie

Draw a Ellipse constrained by four existing non-parallel line segments.

Polyline

Tool

Icon

Command

Description

Polyline

icon43

pl, polyline

Draw an open or closed continuous line consisting of one or more straight line or arc segments defined by endpoints and / or radius or angle for arcs.

Tool Options:
tlopt19
Options include Line and for curved segments; Tangential, Tan Radius and Angle.

Add node

icon44

Add node to existing polyline. (Use “Snap on Entity” to place new node on segment.)

Append node

icon45

Add one or more segments to an existing polyline by selecting polyline and adding new node endpoint.

Delete node

icon46

Delete selected node of an existing polyline.

Delete between two nodes

icon47

Delete one or more nodes between selected nodes of an existing polyline.

Trim segments

icon48

Extend two separate non-parallel segments of an existing polyline to intersect at a new node.

Create Equidistant Polylines

icon49

Draw a given number of polylines parallel to a selected existing polyline with a given distance between lines.

Tool Options:
tlopt20

Create Polyline from Existing Segments

icon50

Create polyline from two or more existing separate line or arc segments forming a continuous line.

Select

Hint

When the pointer is in the shape of an arrow, i.e. no tool selected, it is, by default, in a select mode. One can select single or multiple entities by clicking on them or select multiple entities by mean of a window:

  • Drawn from left to right (blue), it will select all entities fully included in it.

  • Drawn from right to left (green), it will also select intersecting entities.

Deselecting can be done by pressing the esc key, or Selection Pointer from Edit menu

Tool

Icon

Command

Description

Deselect all

icon59

tn

Deselect all entities on visible layers ([Ctrl]-[K] or default [Esc] action).

Select All

icon58

sa

Select all entities on visible layers ([Ctrl]-[A]).

Select Entity

icon51

Select, or deselect, one or more entities (default cursor action).

(De-)Select Contour

icon54

Select or deselected entities connected by shared points.

Select Window

icon52

Select one or more entities enclosed by selection window (L to R), or crossed by selection window (R to L) (default cursor “drag” action).

Deselect Window

icon53

Deselect one or more entities enclosed by selection window (L to R), or crossed by selection window (R to L).

Select Intersected Entities

icon55

Select one or more entities crossed by selection line.

Deselect Intersected Entities

icon56

Deselect one or more entities crossed by selection line.

(De-)Select Layer

icon57

Select or deselected all entities on the layer of the selected entity.

Invert Selection

icon60

Select all un-selected entities will deselecting all selected entities.

Dimension

Tool

Icon

Command

Description

Aligned

icon61

da

Apply dimension lines and text aligned to an existing entity by selecting start and end points on a line segment and placement point for the text.

Tool Options:
tlopt06

Linear

icon62

dr

Apply dimension lines and text at an defined angle to an entity by selecting start and end points on a line segment and placement point for the text.

Tool Options:
tlopt05

Horizontal

icon63

dh

Apply dimension lines and text aligned to an entity by selecting start and end points on a line segment and placement point for the text.

Tool Options:
tlopt06

Vertical

icon64

dv

Apply dimension lines and text aligned to an entity by selecting start and end points on a line segment and placement point for the text.

Tool Options:
tlopt06

Radial

icon65

dimradial

Apply dimension lines and text a circle’s or arc’s radius by selecting entity and placement point for the text.

Tool Options:
tlopt06

Diametric

icon66

dimdiameter

Apply dimension lines and text a circle’s or arc’s diameter by selecting entity and placement point for the text.

Tool Options:
tlopt06

Angular

icon67

dimangular

Apply angular dimension by selecting two existing non-parallel line segments and placement point for the text.

Tool Options:
tlopt06

Leader

icon68

ld

Draw a text leader by by selecting start (arrow location), intermediate and end points.

Modify

Tool

Icon

Command

Description

Order

Order entities within a layer. Selected entities can be moved to top, bottom, raised (moved forward) over another entity or lowered (moved backwards) behind an entity.

Move / Copy

icon69

mv

Move a selected entity by defining a reference point and a relative target point. Optionally keep the original entity (Copy), create multiple copies and / or alter attributes and layer.

Rotate

icon70

ro

Rotate a selected entity around a rotation point, moving the entity from a reference point to a target point. Optionally keep the original entity, create multiple copies and / or alter attributes and layer.

Scale

icon71

sz

Increase or decrease the size of a selected entity from a reference point by a defined factor for both axis. Optionally keep the original entity, create multiple copies and / or alter attributes and layer.

Mirror

icon72

mi

create a mirror image of a selected entity around an axis defined by two points. Optionally keep the original entity and / or alter attributes and layer.

Move and Rotate

icon73

Move a selected entity by defining a reference point and a relative target point and rotating the entity at a given angle. Optionally keep the original entity, create multiple copies and / or alter attributes and layer.

Rotate Two

icon74

Rotate a selected entity around an absolute rotation point, while rotating the entity around a relative reference point to a target point. Optionally keep the original entity, create multiple copies and / or alter attributes and layer.

Revert direction

icon75

revert

Swap start and end points of one or more selected entities.

Trim

icon76

tm, trim

Cut the length of a line entity to an intersecting line entity.

Trim Two

icon77

t2, tm2

Cut the lengths of two intersecting lines to the point of intersection.

Lengthen

icon78

le

Extend the length of a line entity to an intersecting line entity.

Tool Options:
tlopt18

Offset

icon79

o, pa, offset, parallel

Copy a selected entity to a defined distance in the specified direction.

Bevel

icon80

ch, bevel

Create a sloping edge between two intersecting line segments with defined by a setback on each segment.

Tool Options:
tlopt16

Fillet

icon81

fi, fillet

Create a rounded edge between two intersecting line segments with defined radius.

Tool Options:
tlopt17

Divide

icon82

di, div, cut

Divide, or break, a line at the selected ‘’cutting’’ point.

Stretch

icon83

ss

Move a selected portion of a drawing by defining a reference point and a relative target point.

Properties

icon84

mp, prop

Modify the attributes of a single entity including layer, pen color / width / line type and the entity’s geometry (varies by type of entity).

Attributes

icon85

ma, attr

Modify the common attributes of one or more selected entities including layer, pen color / width / line type.

Explode Text into Letters

icon86

Separate a string of text into individual character entities.

Explode

icon87

xp

Separate one or more selected blocks or compound entities into individual entities.

Delete selected

icon88

[Del], er

Delete one or more selected entities.

Info

Tool

Icon

Command

Description

Distance Point to Point

icon90

dpp, dist

Provides distance, cartesian and polar coordinates between two specified points.

Distance Entity to Point

icon91

Provides shortest distance selected entity and specified point.

Angle between two lines

icon92

ang, angle

Provides angle between two selected line segments, measured counter-clockwise.

Total length of selected entities

icon93

Provides total length of one or more selected entities (length of line segment, circle circumference, etc.).

Polygonal Area

icon94

ar, area

Provides area and circumference of polygon defined by three or more specified points.

Others

Tool

Icon

Command

Description

MText

icon96

mtxt, mtext

Insert multi-line text into drawing at a specified base point. Optionally define font, text height, angle, width factor, alignment, angle, special symbols and character set.

Tool Options:
tlopt23

Text

icon96

txt, text

Insert single-line text into drawing at a specified base point. Optionally define font, text height, alignment, angle, special symbols and character set.

Tool Options:
tlopt23

Hatch

icon97

ha, hatch

Fill a closed entity (polygon, circle, polyline, etc) with a defined pattern or a solid fill. Optionally define scale and angle.

Points

icon99

po, point

Draw a point at the assigned coordinates.