A screenshot/screen recording saves time, is useful to add to documentation, and aids async communication. Before you begin, think about what the "final product" should look like (what's the structure, what you want to convey, etc.).
Tools to try:
You can use a pair programming platform, a code editor with live sharing functionality, or screensharing tools with remote access.
If you have the budget, specific pair programming platforms will typically provide a smoother experience and better remote functionalities than the other options. For the latter options, your team will need to use the supported code editors or screensharing tools.
If you're looking for a mentor to pair program with, you can also use a pair programming platform (like Codementor)
It's important to ask yourself, how do you normally collaborate visually with your team? If you like to use sticky notes, write things on a whiteboard, draw mindmaps or tables, there are online whiteboarding tools that you can use.
Some tools to choose from: