I've inherited a PNG file that I'd like to edit. It contains graphics and text elements. I've tried to select different elements (such as text box) but nothing will activate. Can anyone help. I do have the file if someone would like to take a look at it.
The only way a PNG file would behave as you seem to wish it to is if it were a "fireworks" png. That is, saved to disk by fireworks. That software uses a proprietary way to save png's and it is the only widely available application to do so.
In any other case you likely have what's called a "flat" png, in which you can not select elements, just pixels. Depending on the complexity of the image, you might be best off: 1: Asking for the source file from the one who gave you this image. 2: Recreating it in graphics software of your choice. 3: Get someone else to perform step 2.
It depends on what you want to change. If just the text, then you can chop that out of the original (if it is possible), find a replacement font to buy, and redesign it. It would probably be better than hacking on something forever.