How do I change the orientation of My Shortcuts to horizontal on the top of the page; and how do I add "Write Check" icon to My Shortcuts?

Good day, assetydoc. 

I'd be glad to walk you through the steps.

You can change the direction of your My Shortcuts tab by going to View > Top Icon Bar. Here's a sample screenshot of what it looks like:

For adding the Write Check option, here's how:

1. Click the Rightwards Arrow located in the upper right-hand before the search field.
2. Select Customize Icon Bar.
3. In the Customize Icon Bar window, click the Add button.
4. In the Add Icon Bar Item, highlight the Write Checks option. Then, select an icon, edit the Label and Description.
5. Hit the OK button twice.

Please see this sample screenshot:

I'm also adding this article that you can bookmark for future reference: Create, modify, and print checks.

If you need anything else, just leave me a reply and I'll get back to you. Thanks.