I found it could be done in a left hand sort of way by pinching the screen image to reduce its size with one hand and while it’s reduced I’d take a screenshot. Then using the edit function I’d use the reframe/cut feature to trim off the areas outside the image I’m keeping. The result is an image size that the forum will accept as an attachment.
![Wink ;)](./images/smilies/icon_wink.gif)