The shortcut key for bidding in word is: Ctrl+= key combination.

In addition, superscript has the following input methods:

Method 1:

1, select the text to be set as superscript;

2. As shown in the figure, click the superscript button on the Start tab.

Method 2:

1. Select the text to be set as superscript, and click the button displayed in the lower right corner of the Start tab;

2. In the pop-up font dialog box, select the superscript check box, as shown.