It would be more easy for us to help you if you would define what you expect. What are your requirements on an IDE for VHDL coding?
First I think you need a good wordfile for syntax highlighting VHDL. The
user-submitted wordfiles page has a link to a wordfile for VHDL. You should search for VHDL also with the forum search because I remember that I helped some other users to adapt their VHDL wordfile to get more help by UE/UES with code folding, highlighting matching braces, auto-indent, etc. Further UE/UES now support a grouped function list. So it is possible to not just see function names in the function list view. With appropriate regular expressions you probably can see in the function list view a tree with sections with 1 or more functions and the "parameters" or "variables" of the functions. I'm not familiar with VHDL, so please forgive me if I wrote here nonsense for VHDL.
If your VHDL projects usually consist of more than 1 VHDL source code file, it would make sense to use
Ctags in your projects to build symbol database files to be able to easily jump to a symbol definition in same or another VHDL source file of your project. Ctags natively supports VHDL. The symbol parser of UEStudio can't be used because it does not support language VHDL. But that does not really matter for UES (or UE) as long as Ctags installed with UE/UES builds the symbol database file regularly depending on your settings.
Finally you want to build your VHDL source code files to the output file you want. In UEStudio a configuration file defines the rules how to compile, build or rebuild the source (of various types) to destination output. For writing such a configuration file you need the manuals of your VHDL tool chain. Further it is good practice to start with a template. For example
configs\Turbo C Compiler\Application is quite simple and therefore good to use as template. Of course if you know any of the tools (compilers) for which a configuration file exists already, use that tool. Read the comments at top of the existing configuration files to see which variables are by default available. For details on the sections and which commands are available for every section open help of UEStudio and click on tab
Index. At top of the index list there are listed the help pages with [...] in the title. These are the help pages you need to understand the sections and commands in the configuration files.
If you need more help, please ask here in the forum or IDM support by email.