The Line Join(Mitered, Rounded, or Bevelled) 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 Stroke option to open the Stroke Panel.
To alter the Line Cap Type:
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 Join Typeoption.
To close the Stroke Panel, tap on the Hide Sidebar Button located at the bottom of the sidebar panel.
The image below shows what a Square would look like with a Mitered, Rounded, and Bevelled Line Join.
Note: A line join change will be seen instantaneously when a stroke figure is selected. If no figures have been selected, the line join change will apply to all subsequently created stroke figures.