I am trying to add text to pictures, but they do not appear. If I move the text box outside the picture, the text appear. What am I doing wrong
You have text wrap applied to the image frame. You have two options:
If you don't need other text t wrap around the image, remove the wrap.
If you do need the wrap for other text, select the frame you need on top, go to Text Frame Options... and check the box to Ignore Text Wrap.
Thank you very much.