The Stroke Size of a figure (width of a stroke in pixels) 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 Stroke Size:
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 "Up" or "Down" arrow buttons to increase or decrease the size by increments of one or perform a Single Tap on the text entry field to open the text editor and type in a value.
To close the Stroke Panel, tap on the Hide Sidebar Button located at the bottom of the sidebar panel.
Note: A size change will be seen instantaneously when a stroke figure is selected. If no figures have been selected, the size change will apply to all subsequently created stroke figures.