The already selected sheet in the move to sheet dialog doesn't indicate what sheet the entities are already on, it indicates which sheet is the currently active working sheet. The only way to see what sheet something is on is by using the list command. (This goes for all the properties, the graphical dialogs shows the currently active "working" properties, not the ones from the selected entities.)

In addition to making sure the text is on the right sheet, it is also important that the glow effect you have is strong enough to actually be visible, a weak glow may be more or less invisible.

I prefer Maptools myself, but I have a weird setup as we do our gaming face to face, but uses Maptools for a digital battle mat instead of physical miniatures, but everything else (rules, dice rolls) are handled the traditional way.

Personally, I do enjoy the fact that it is NOT an online application, so we can run everything locally. No subscription fees, no limits to map sizes, full control. Bit more work to get started than just going to a webpage obviously, but for my use, it is great.

I run the server (in player mode) on the machine connected to the projector so it only displays what the players see (I use combined vision from all the player tokens, no individual view) and then run a client on my laptop in GM mode to control it. Players can connect to the server if they want to, or just use laser pointer to point on the screen to tell me to move their token. This is a great setup since I can update things secretly using the GM client (like adding enemies, or even add a completely new map) without any disruption to the player view while I work.

When you make a map in CC3+ and insert symbols and fills the proper way (i.e. use the provided symbol catalogs and drawing tools), the map will reference the CC3+ data directory. This means you can move the map wherever you want (even to another computer, as long as the products are installed) and it will still work (Even if the data directory is installed to another location on that other computer). The only important thing here is to NOT move around the art files inside the data directory, they need to stay where CC3+ put them

When you manually insert files, like a bitmap for tracing, it is usually either inserted with an absolute path, meaning if you later move the bitmap anywhere, the map won't find it and you get a red X, or a map-relative path, which means you need to keep it in the same relative location as your map (usually the same directory) and move both when you move one.

If an example map shows red X's, it is because it use stuff from a product you haven't installed.

You can always figure out where things are supposed to be by using the Info -> List command on the entity with the red X, or if it is a symbol, open symbol manager, find it in the list, and hit the list button.

More about file paths.

Last's years annual may be of interest as a starting point. It contained two issues dedicated to graveyards and crypts.

This is a dungeon style though, but if you are going to a zoom level where you can actually see such details, you kind of end up there. For larger scales, city, and especially overland, such details tend to disappear.

As far as I know, there aren't any necropolis styles for overland or city, but perhaps some of the darker styles may be appropriate to provide the right mood, like Darklands and Darklands City.

Please remember to mark them in the terrain as you pass though them for the benefit of future travelers.