Unknown text on calc chart

[deniscampbell]

L.O. 24.2.7.2 on Linun Mint 22.1
The attached image shows the words Bisoprolol 2.5 in the centre of the chart.
I somehow entered this several years ago but cannot find the words anywhere on the spreadsheet nor in the Wall or Chart Area formatting. I cannot select the words (like in a text box).
I can get rid of it by making a new chart, but would like to know where it is.

[mikekaganski]

I have a line chart with the letter Z in the center. How can I remove it?

This might be not a malfunction. The text over the object is similar to what you get when you create a rectangle, insert an image, etc, then select the object and start typing. And of course, when you later select the same object and start typing again, you edit the text you entered previously. Select the chart; type any character to enter the edit mode; then backspace to remove all text. Insert▸TextBox and Format▸Object▸Text (both when the chart is selected) are relevant for this functionalit…

[deniscampbell]

Excellent! Just type a letter and I got into the text box and deleted the words. So simple!
Thanks.