Hello JustAsking, welcome to the GMB.
For resizing pics, have you seen our Help topic on this -
TECHIE TIPS: Resizing images to fit the board? As stated at the end of the Help topic, I recommend
www.picresize.com as an easy to use online resizing routine - just set the longest side to 700 pixels and let the routine do the rest; if the Kb size is still greater than 125Kb then simply go back a couple of stages in the routine and try a slightly smaller number of pixels.