Try it and see, Graham!! You'll need to select the " inline full-size image option"...... as in
" the SRGC Forum has undergone some changes recently and if using the (attachimg=1) code - with the square brackets (rather than the ones I've used to allow you to see without confusing the system with code) it is possible to attach larger photo sizes which will be automatically resized to the page and open in the text box."
These are the square brackets [ ]