When using a high-resolution monitor, Maple's display might not be scaled properly.  Unfortunately, this is a well-known Windows 10 issue that affects more than just Maple, but you can improve the display by trying the following:

Override the high DPI scaling behaviour for Maple. To do this:

Right-click Maple’s shortcut.

Select Properties (at the bottom).

Open the Compatibility tab.

Click high DPI Settings.

Ensure "Override high DPI scaling behavior is checked, and

Select "System" from the "Scaling performed by" dropdown box.

Click OK in the high DPI settings dialog.

Click "Apply", then "OK" in the Maple shortcut properties dialog. 

This may cause jogamp processes to slow down the start-up.  If this happens, please disable ANLL for Maple.
Lower the overall Windows DPI setting. To do this:

Search "dpiscaling" from the Start menu and run the first item that comes up.

Under "Scale and layout", change the "Change the size of text, apps, and other items" dropdown menu to 100%.

You may also want to increase the size of the Toolbar icons: