Let's go through this step by step.
We will assume that you uploaded your pictures to Photobucket.
1. Move the cursor to a picture and click the
Edit selection from the little line just atop the picture.
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2. In the picture Edit window, click
Resize.
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3. Look at the
New Size area.
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4. Unfold the
Preset Sizes by clicking on the arrows and pick a size.
or
Type in a new size, being careful to maintain the proportions.
(I changed that picture size to 300 x something or other.)
The recommended picture size is 639 X 426.
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5. At the bottom of the
Edit window (you may have to scroll down your screen)
Click either Save a copy
or
Replace original.
To keep my bookkeeping straight, I generally click
Replace.
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6. Look to the left and click on the
View album.
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You will be taken back to the album where you can work on another picture, or move on to get the proper link to paste into the forum post.
Hurry. I am dying to see these pictures.