There are multiple ways to create a new gift.

 
From the main grids (Constituents, Gift, Interactions or Documents), you can highlight the constituent, click on the New button at the top of the grid and select Gift. Enter the gift information and click Save. If you do not want to save your changes, you can click Cancel.
 
From within a constituent record, you can click on their Gifts sub-menu that appears on the right above their information. Click on the +Gift button at the top. Enter the gift information and click Save. If you do not want to save your changes, you can click Cancel.