After installing, you will be able to generate explanations for any code on open files within VS Code. All explanations are short so for more details on specific lines or syntax, the best practice is to type in a follow up question.
Select code you want included in context and choose the ExplainDev option in your right-click menu. A new tab will open with a short explanation of what the code is doing.
At the top of the side bar is a search box. Type in questions here and hit Enter to get direct answers.
Any code that you select will be used as context for answers generated by ExplainDev. ExplainDev generates some pre-populated questions and answers to help provide useful information in support of the initial explanation. Click on the pre-populated questions to expand and view their answers.