I'm not a wizz at this, I use Paint on my lap top. Sometime I get lucky.
Paint, Click on picture for Paint, Image, Resize/Skew try 50 - 80,
Save picture, (My Bike001, My Motor002, MotorBike008)
( C:\Users\...\MotorBike\008 )
Attach Files, Manage Attachments, jpeg, C:\Users\...\MotorBike008
Play with Your Reply to Thread: type something, Additional Options, Attach Files, see what it looks like. Preview Post. Don't Submit Reply just see how it looks. Go to your back botton to get out!
Good Luck!
... Jim