Creating Image Captions: Best Practice?

Hello-

I'm currently using RoboHelp to create an HTML-based internal user guide for a software product. This guide has many images and figures in it and each will need an accompanying caption. Each caption must appear centered directly beneath the accompanying image.

I need some guidance on two issues, please:

1. What is the best practice for inserting a caption along with an image?  I currently cannot find any tool or which enables a RoboHelp user to insert an image into a document and designate a caption to be displayed with that image.

2. Each image will be uniquely numbered (Figure 1, Figure 2, etc.). It may be necessary, as the document is drafted and redrafted, to remove images from and insert other images into the document. How can the numbering of images be set up so that the removal or addition of an image will automatically reset the numbering of all affected images accordingly?  I would very much like to avoid resetting dozens of image number-designations manually.

Thank you-

Michael