TRIM

TRIM cuts away the part of an object that runs past another object. Click the piece you want to remove, and Musa CAD cuts it at the nearest crossing on each side.

How it works

Type TR and press Enter. Musa CAD shows the current settings, then waits for you to click what to remove. The piece that will go is highlighted under the cursor before you click. Press Enter when you are done.

Command line

Command: TR
Current settings: Projection=UCS, Edge=None, Mode=Quick
Select object to trim or shift-select to extend or [cuTting edges/Crossing/mOde/Project/eRase]: (click an end)
Trimmed 1 object.
Select object to trim or shift-select to extend or [cuTting edges/Crossing/mOde/Project/eRase/Undo]: Enter

Clicking each of the four ends trims them back to the rectangle.

Plotted by Musa CAD 0.8.0 from the example drawing cmd-trim.musaDownload the drawing

To trim many objects at once, drag across them with the mouse button held down. Everything the path crosses is trimmed. In Quick mode you can also click on empty space and then a second point; in Standard mode that click starts a crossing window instead.

Hold Shift while you click to extend an object to the next edge instead, as EXTEND does.

Quick and Standard mode

TRIM has two modes. Musa CAD starts in Quick mode.

• Quick: every object in the drawing is a cutting edge. You only click what to remove. If what you click has nothing to trim it to, it is deleted, and Musa CAD says Deleted: nothing to trim it to.
• Standard: you first choose the cutting edges, then click what to trim. Objects that do not cross a chosen edge are left alone.

Command line

Command: TR
Current settings: Projection=UCS, Edge=None, Mode=Standard
Select cutting edges ...
Select objects or <select all>: (pick the edges) Enter
Select object to trim or shift-select to extend or [cuTting edges/Fence/Crossing/mOde/Project/Edge/eRase]:

In Standard mode, objects you selected before starting TRIM become the cutting edges, and pressing Enter at Select objects makes every object an edge. Switch modes with the mOde option. The mode is kept for next time, and is the TRIMEXTENDMODE setting.

Options

Option	What it does
cuTting edges (T)	Choose which objects to cut against, instead of all of them.
Fence (F)	Standard mode. Click points to draw a line; everything it crosses is trimmed. Press Enter to finish.
Crossing (C)	Click two corners. Everything the window crosses is trimmed.
mOde (O)	Switch between Quick and Standard.
Project (P)	None, Ucs or View. Kept for AutoCAD habits; in a 2D drawing it changes nothing.
Edge (E)	Standard mode. Extend cuts against where an edge would reach if it went on, even if it stops short. No extend cuts only where edges really cross.
eRase (R)	Select objects to delete without leaving TRIM.
Undo (U)	Puts back what the last click or path trimmed. It appears after your first trim.

Good to know

• Lines, arcs, circles, ellipses, splines, polylines, construction lines and rays can be trimmed. Clicking anything else says so.
• Each click, drag or fence is a separate undo step, both inside TRIM and with U afterwards.
• Trim: no crossing edge found. means nothing crosses the object near where you clicked. In Standard mode, check that the edge you need is selected, or turn on Edge Extend.
• A circle needs two crossings to be trimmed, because it has no ends.

Compared with AutoCAD

TRIM follows AutoCAD’s newer behaviour: Quick mode by default, the highlighted preview, and Standard mode with the classic cutting edges. Projection is accepted but has no effect, because Musa CAD is 2D.

Next

• Lengthen objects to meet an edge with EXTEND.
• Round or bevel a corner and trim it in one step with FILLET or CHAMFER.
• Remove a piece between two points with BREAK.