Concise descriptions or hints.

Good point, I reviewed all tooltips and edited many of them.

Suggested addition to the view dialog. In the real drawing world the "fit page in window" view is extremely useful. Equally useful is the view "fit page width in window". This is especially so since much work is done in portrait mode.

Done, there's now a menu command to fit to page width. Someone has to draw an icon for it, then it can be added as a button. Feel free to suggest a keyboard shortcut too.