I'm wondering what you mean by 'editing' the images.
Usually the placeholders are in a separate composition and you merely have to drag your own images in a layer above the placeholder. So try checking for placeholder composition.
Are you able to share the project file? If so I will gladly check it out for you.
If this is one of your early forays into using After Effects, the process of modifying templates may not be as straightforward as you think. Template designers assume that the user has pre-existing knowledge of AE, and that knowledge can range anywhere from basic to expert.
Thus, simple possession of a template is NO guarantee of success for the novice.
If you're new to the application, I strongly recommend learning the basics, without which you will be lost:
Usually the placeholders are in a separate composition and you merely have to drag your own images in a layer above the placeholder.
The media won't have the properties of the placeholder. You need to replace the placeholder with your media. That's why it's called a placeholder.
I'm attaching an image that shows how my image is displayed when I double click it in the timeline in the hopes of opening and editing it in the composition window. As you can see, it opens in the "layer" window and I'm unable to edit or do anything with it. In this example, I'm trying to replace "image 10" with my jpg.15. Can anyone tell me what I'm doing wrong? Thank you!
Could you please take a proper screenshot or even several screenshots so I can see the source maps opened?
If you are merely trying to replace an image with your own, right click on in the image folder in the source pane and select 'Replace footage'.
@Peru Bob: He is trying to replace placeholder footage with his own footage in a template. A good template workflow would be to add properties to the placeholder composition containing the placeholder footage rather then merely adding all kinds of effects to the placeholder footage itself.
There's two ways to replace the content in that composition you have open. One is to delete the existing layer, then drag your image or footage into that comp. You may have to resize your content to fill the comp. If the existing layer has effects on it, you can replace with you content and retain the effects by selecting the existing layer then drag your image or video onto the existing layer while holding the option key (or alt on PC). This replaces the content while keeping all the effects and other parameters the same. Here's a quick movie showing this technique:
Hope this helps.