The Line Cap (Butt, Rounded, or Square) of a figure can be altered by accessing the Stroke Panel. This panel can be opened in one of the following ways:
Press on the Stroke Button located in the Drawing Toolbar.
Then press on the Strokeoption to open the Stroke Panel.
To alter the Line Cap:
Enable the Stroke Visibility option (if disabled) by tapping on the On/Off toggle in the upper right corner of the Stroke Panel.
Press on the desired Line Cap Type option.
To close the Stroke Panel, tap on the Hide Sidebar Button located at the bottom of the sidebar panel.
For example, the image below shows what a Line would look like with a Butt, Rounded, and Square Line Cap.
Note: A line cap change will be seen instantaneously when a stroke figure is selected. If no figures have been selected, the line cap change will apply to all subsequently created stroke figures.