If you notice that the Generate Correspondence button is missing when you go to create letters and/or emails, please take the following steps:

In Internet Explorer - 
1. At the top right of the browser, click the gear-shaped icon
2. Scroll down to Zoom > Set this to 100%
3. Maximize the GIFTS Online window if you have not done so already

In Firefox - 
1. At the top right of the browser window, click the icon that appears as three horizontal bars
2. Click the percentage in the middle of the + and - sign to reset to 100%
1. Hold Ctrl key and press 0