Once you've signed in to your WeDidIt dashboard, click 'donation page' from the left hand panel, then click 'settings' from the drop down menu:
From here, you can edit the different sections of your general donation page:
Add a description or mission statement for your organization. Choose between a post-donation experience image and a post-donation experience YouTube video. If you use a picture, upload it here, if you use a video, paste the YouTube URL in using the format indicated. Write in a tax-receipt message and choose your recurring contribution preferences & amounts.
When you're finished updating each section, be sure to preview it to make sure it looks the way you want it to, and then make sure to click 'update' before moving on to the next step.