An image caption is a small piece of text or word under a picture that gives information about an image you will use in Google docs. In Google docs, you can do figure numbering, add table caption and add text to image, but there is no built-in feature to do this directly, then how to add caption to image Google docs. There are some tactics that you can use to solve your problem.
3 Ways to add caption to image Google docs. You can add photo caption by using Inline, Add-on, and by using Drawing.
Click an image in which you want to add caption. Now select Inline from the below menu as shown in below image and write your captions
There is an add-on name as Caption Maker. You can install a caption maker and add caption to image Google docs. This tool helps you to create and add caption for images, drawings captions, and to add a caption to tables also.
With the help of Text box in Google docs, you can add caption under image. Follow below steps
Go to Menu -> Insert -> Drawing.
Click Image button and Upload your image from computer in Google docs
Click the Textbox button from the menu.
Draw the textbox below your image, write your text there as shown in below screenshot.
You can adjust the font size, color, etc.
You can add caption to table in Google docs via Caption Maker add-on, which is a great tool for not only figure numbering but also for add captions to table. You will get the option for placement of caption Above or Below, for Formatting and for Numbering, etc.