Application Preferences

Toolbar / Icon:
   
Menu: Edit > Application Preferences
Shortcut: Ctrl+, (Mac: ⌘,)
Commands: preferences

Description:

In the application preferences dialog, you can adjust the look and behavior of QCAD and its tools and graphics views.
QCAD also stores some of these settings inside the drawings. Those settings can be changed in the application preferences as default settings for new drawings. In other words, they don't affect existing drawings but only drawings that are created after the preferences have been changed.