I’m really liking Inkscape. I wanted to customize it on macOS to make its default document a letter document in portrait (Inkscape ships with the A4 as the default). To make this change:

1. Open Inkscape and create a new document.
2. Set the Canvas Size:
   • Go to File -> Document Properties (Shift + Cmd + D).
   • Under the Page tab:
     • Set Units to in.
     • Choose Letter from the preset list, or manually set:
       • Width: 8.5 in
       • Height: 11 in
3. Save the Document as a Template:
   • Go to File -> Save As.
   • Save the file as default.svg to a temporary location like your Desktop.
4. Move the Template to the Correct Folder:
   • Open Finder and navigate to:
     ~/Library/Application Support/org.inkscape.Inkscape/config/inkscape/templates/
   • If the folder doesn’t exist, create it manually.
   • Move your default.svg file into this folder.
5. Restart Inkscape:
   • When you launch Inkscape again, it will use your customized default.svg as the starting document — now with a Letter-sized canvas.