There are many ways to donate within Givsum. You can donate to a charity, or to an opportunity. A donation to an opportunity will still go the charity, but it will be noted that the donation was made for that opportunity. We've outlined a few of the more common ways to help you along:
Click the Search icon to open up the search panel. Enter the name of the Charity and click on the corresponding Givsum Button. Then click "donate" on the menu to bring up the donation form. If this is your first donation or purchase with Givsum you will need to enter your credit card information, otherwise you can just enter the amount and click "Donate".
Most items on your activity feed will include a Givsum Button with the ability to donate to the indicated charity. Making a donation this way will give make your action "inspired by" the user who took the initial action. So if you see a friend gave a 10 dollar donation to a charity and you want to do the same, you can do it quickly and easily via the corresponding activity item.
If you are on a charity's profile page, you will see a givsum button at the top right of the page. Click the Givsum Button, then click "donate" on the menu to bring up the donation form.