#4 Toggle Unit

[Da-vid21]

Current Behaviors

Currently, the default unit of length is Metric (centimeter, or cm), which can be changed to Imperial through the menu (Menu → Edit → Set Units), which is shown in the figures below. However, Xfig users always prefer doing actions through shortcut buttons on the Editing Mode Panel on the left-hand side of Xfig.

Expected Behavior:

Create a unit toggling button on the Editing Mode Panel on the left-hand side of Xfig. This toggling button should deliver the same behavior as the menu version: First click will change the unit to Imperial, and one more clicking will change it back to Metric.