When I right click the file there is no option for properties

Not working, properties doesn't show up when I right click, and terminal doesn't recognize the command

Thanks for the welcome!
Ok so I downloaded the x64 lmms package but my chrome book wont let me run it
how do I install appImage with terminal?

So I've searched through this forum quite a bit and tried a few different tips and I have yet to find a solution I see this issue has come up alot so forgive me if the answers been posted and I haven't found it, so here goes.. I recently received a chromebook as a gift and after spending about 5 hou...