Many years (and computers) ago I made a number of dot files. I kept all the dot files and the jpg’s I made from them and a guide to using dot. Now I want to edit them and make more (on a Windows 10 computer) so I downloaded GraphViz. I installed it according to the very nice instructions on this forum and rebooted for good measure. There’s one detail I can’t find, though: How do I run/open GraphViz? There’s a folder in my Start menu, but it only contains “Uninstall.” Do I need another program? Do I use a command line to convert the code into pictures?
You can start a cmd window (or a powershell window) and then type the standard command line stuff:
dot -Tsvg myfile.gv >myfile.svg
The provided answer with the command line is the accurate one, yet as your question was inclined to some kind of gui, it’s worth mentionning the hosted graphviz on webservers that offer a convenient text to graph conversion. An example mentioned in the official graphviz Resources page is this one :
This is obviously more convenient as it does not require any install but not appropriate for offline usage nor for confidential data.
Various editors (such as Atom and VSCode) have extensions for enabling graphviz preview functionality - you could try that out.