Questions about images in Interfaces

Question

Hi all, I have just passed the Appian Designer test. However, much of it was theory. I am not practically trying to build applications and need some help. I have some questions on images: 
 
 1. How do I simply add an Appian Icon to my interface? 
 2. How do I add an image (I believe I have to upload it as a document object then refer to it)? 
 3. On Billboards, I can easily add an image but I can't seem to add text in the billboard, how do I add text? 
 
 What is the best practices in adding an image? 
 Thank you for your help. Eric

Hrishikesh Dixit · Answer

Also please refer the UX design guide which is a collection of best practices and recommendations for creating attractive and usable interfaces. It has details around accessibility considerations for usage of documents and icons. 
 docs.appian.com/.../ux_icon_overview.html

charlesm492 · Answer

In order to add an icon, you can do something like this: 
 a!richTextImage(
	image: a!documentImage(
 document: a!iconIndicator(
 icon: "OK"
 )
	)
)