Measurement units

Im unable to change my measuring units to metric millimeters

Do you mean you are unable to or you don’t know how to?
If the former you need to tell us what the issue is.
If the later perhaps this helps.
Units web

1 Like

Thank you for your reply, in answer to your question, I didn’t know, I’ve since found how to change it , but I would like to find a printed list of what each tool does to keep as a quick reference.

Chris Boyce

SketchUp for Web | SketchUp Help

It is wise to remove your email adres from the post, there are bots roaming the internet for information like that.
You can use the pencil icon to do that…