Adding Segments and Rings to a mesh sphere after it's created.. possible?

So I’m running into an issue which seems like it should be a non-issue. When I go to create a sphere for instance, it will immediately give you the options to add segments or rings around the object to make it more detailed. Soon as you click off the object or move it or whatever, that menu disappears. Is there any way to get that menu back? If I make an object and find out later on I wanted more segments or something, do I have to delete it and start over?

Is there any way to get that menu back?

No

If I make an object and find out later on I wanted more segments or something, do I have to delete it and start over?

Depends on what changes you want to make. Edge Loops (Ctrl+R) and To Sphere (Shift+Alt+S) or Loop Tools addon or Cast Modifier set to Sphere may enable the changes

It depends on how far into the build I am. But, having said that, almost every single time I’ve tried to bend any mesh (sphere or whatever) to comply with updated build specs, it’s taken longer than just starting over. Of course, there’s also a lot to be said for what you learn by “building it from the wrong base.” It’s all valuable, IMHO.

I think of various versions of models as first draft, second draft, etc. That way I can justify all the extra time that gets pissed away and I don’t go insane.