Highlighted text keeps changing

When trying to highlight text, the highlighted parts keep jumping around and it takes many tries to get all the text highlighted at once.

You’re doing that with the mouse? Not sure what causes that.

You can select text by pressing the Shift key and arrow keys as well. Ctrl+Shift+Right selects one word at a time. Play with that to find all possibilities.

EDIT (After reply) In a text box you just have to press Ctrl+A to select all text. I didn’t have any trouble selecting text in the text box. Maybe your mouse is malfunctioning?

I tried that but doesn’t work at all. Perhaps I should explain more in detail. I transferred a picture into writer and tried it in draw also. I made a text block then typed in all my text. Then I tried highlighting it to either change the font or size. Like I said before, as I run down the blinker to highlight all the text, some of it highlighted and some did not. Some was highlighted then went away. I tried holding down the Ctrl+Shift etc but it did nothing.
Thanks for your help.
hawk