You can switch between entering text and math.

In the context bar, the current mode is indicated.

From the Edit menu, select Switch to Math Mode or Switch to Text Mode.

In the context bar, the modes indicator switches to the new mode.

Repeat to toggle back to the original mode.

You can also toggle by clicking Text or Math on the indicator or by using the F5 shortcut key.

At a Maple prompt, this menu item allows you to switch between 2-D math and 1-D math (also called Maple Input) modes.  In this case, "Text" applies to Maple Input.  See also Context Bar for Maple Input.

Note: Set the input display mode from the Display tab of the Options dialog. See Options>Display.