Bring up your pic. in Paint on your computer. Look up top at Image. Go to Stretch - Scew.
Reset those values from 100% to about 10 X 10% for a signature pic and maybe 25 - 25% for a post. After it looks about the right size save the pic in Paint with a name you can recognize. Log back on to TF and when you browse for the pic insert the smaller one's you have saved from Paint. Good luck! Can't wait to see that Flounder