If the Global Options dialog box is not displayed, choose Global from the Options menu.
Click the Cursor Style button and choose the cursor style option you want:
Box (the default)
None (the cursor is invisible)
Click OK at the bottom of the Global Options dialog box or press Return to save your selection and exit the window.
To save your selection and retain the window, click Apply.
The changes you make will be visible on existing dtterm windows; you don't have to start a new one.