After clicking on it, the next click on your drawing will set a tack there, meaning that point remains fixed under further transformations. If you hold shift down while doing this, you can specify two tacks and so fix, the line between them. Toolbar Most constructions involve the menus and the toolbar . Here the hand tool moves the entire figure while the pointer tool only moves selected pieces. The kind of motion which results depend on how many tacks have been specified.
Translations happen when there are no tacks.
Rotations and Dilations happen with one tack. Shears and Strains happen when two tacks are present. Reflections can be generated from the menu entry Mirror Tack Axis under the Transform menu, when two tacks have been specified. In its own folder toplevel on all Macintoshes in the lab. Printing Discover Form is very old, and it is not clear how well behaved it is at printing.