Please Help images don’t safe when changes are made and how do I put in my Logo!

[Lynlabiephotography]

Hello please help me!

today I starded a trial version of Lightroom. I cant safe the changes I made on my computer or when I sent it to for instance photo's on my iPhone it does not save the changes and just makes a copy of the original foto? 
The other problem I have is to put my personal image logo on to the picture? When I use PSX it very easy bud in Lightroom I can only put in letters? 
excuse my grammar 

[Rob_Cullen]

All 'Lightroom' versions do not have a 'Save' function. To make new files that have the editing applied we need to use the Export function. Lightroom does not let you over-write your original files.

At the moment (nobody knows the future) only Lightroom-CLASSIC can export photos with a Logo/Graphic watermark applied.

The Cloud based Lightroom (on a PC or Mac) has 'Text only' watermarks.

https://community.adobe.com/t5/lightroom/add-text-watermarks-to-images-using-lightroom-desktop/td-p/...