Sorry, I know the title question is a little confusing so I'll try to better explain. I am brand new to adobe programs, so there may or may not be a very simple solution/way to do this that I don't know about because to be honest I don't know much.
I'm using indesign to create a poster presentation for a research symposium, because quite frankly I think all of the power point templates really suck. At first I was just going to work with a basic color scheme, so when I started creating my document the background is just plain white with many grey text boxes as shown below.
Im obviously still tinkering, but I found an image that I'd like to set as the back ground basically under all of these grey text boxes, so that I can make some semi transparent that way you can see this image. How do I go about doing this? Do I have to just start over with the image laid down first and then put my text boxes back over it? If so, is there a simple way to do this? Because it took me AGES to manually configure the text to wrap around my little pig friend there and I would be so bummed if I had to do it again
Look at the Layers panel. Make one layer named Text. Make another layer named Graphics. Drag the Graphics layer under the Text Layer. Put your text frames on the Text layer. Put your graphics on the Graphics layer under the Text layer. The gray-filled text boxes can either be set to no fill, or else the gray fill can be chosen in the Effects panel, and the Transparency lowered to a value less than 100% in order to see through it.
Read a bit here: