Latex text may be oversized compared to the rest of the question text. The reason for this is so it can be more prominent on the page. However this can be resized using the steps below. 

To insert Latex text you must first open up the Latex pop up window, this will appear as a frame (containing the Latex text) in your question text box.

1. In your question text box, right mouse click on the Latex frame and select Math Settings > Scale all Math.
 

A window appears asking what size you would like the latex equation resized to.

2. Type the size you want (eg 100%) and it will resize your Latex text.

3. The rest of the question text can be resized using the Format drop down box – ie the ‘paragraph’ drop down in the Question Text field.

Result

The Latex text has now been resized.