Constraining a circular image ? , +1 other question

[Etdronehome]

I have a circular image overlaying a cameras lens and want to put a round border around it. I tried the typical function keys associated with this type of action and they seem to work but when I use the cntrl key to scale the ht and wt dimensions are never the same. The other FN keys seem to modify the picture frame from a lower left anchor point and scale from that point. Can this be changed/

A second question. 

When I use the forum to ask a question i log in. I compose the questions and when I try to add a reduced size image,  I get a -200 error. I am still logged in ( according to the UN in the upper Rt corner but the work around is to log in again.  Is there a timeout function associated with a start new topic?

Thanks in advance.

Rich

[Callum]

Hi ETdronehome,

Please could you try holding CMD while resizing to see if that does what you are looking for? As far as I know there is no time out. Are you able to upload attachments now?

C

[Etdronehome]

I am able to upload attachments thanks.