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How to use layers with .tiff files using PSE 2024?

By @Fred36434819swm5

Nothing special unless you want to work with a 16-bits layered file (tiff or psd).

Elements does not support 16-bits layered files, which is a very good choice, considering the huge size of those files without any visible difference for you.

So if you get such a file from another software or try to create layers from a 16-bits created in Elements, you are prompted to either ignore layers (the file will be flattened) or to convert or open it in 8-bits, which is the recommended way.

No difference between tiff or psd format.

For pixel peepers:

Yes, there is a theoretical loss to work only in 8 bits, but:

- jpegs only support 8-bits

- the major visible difference is posterization created by extreme stretching of tones in editing.

- your display or printer can't do better than 8-bits. Pros advocating for 16-bits may have more advanced hardware, but they are not Elements users,  they are using Photoshop.

- You can work in 16-bits in Elements without layers. The common use case is if you shoot raw and "open" in ACR in 16-bits. What you edit in ACR is internally computed in 16-bits, and that always take care of posterization risks before ulterior editing.

- With Elements, the loss of quality on layers due to the conversion does not exist when you are only compositing: scrapbooking, page layouts. Only risk with drastic layer modes stretching tone values.

The limitation in Elements has always been assumed by Adobe marketing (more than 20 years ago) to justify the price difference between the "consumer" and the "pro" software.

Your question is not clear.  Are you trying to add text to a tiff file?  If so, simply open the tiff file in the editor and use the text tool.  When you click on it, a new layer will be added to your tiff file.  You then edit your text and confirm the text with the checkmark. 

If you are new to editing, I suggest you look at the Guided Edits.  Elements 2024 has a new guided edit for adding text.

There is nothing special about editing a .tiff file. Once you open it in the Editor, it will become a file with a .psd format.  When you save it, you can save it in whatever format you want.   However, note that if you are saving it to a format such as jpeg, the layers cannot be saved separately and you will have to flatten them.