Callout graphics for Impress slides

I’ve recently downloaded Ubuntu 20.04 LTS. Impress has great features. But it seems to be lacking callout graphics. I really need these for my presentation. Text boxes are insufficient. What am I overlooking or how can I fix this?

View>Toolbars>Drawing menu

or in the sidebar (Ctrl+F5) click on icon “Gallery”.

Is this what you are looking for?