I assume the template is using a paragraph style for formatting. Or plain paragraph styling.
And within that you can use a line style that is based on a character style.
Look up the used character style and you'll find the applied format. You could remove the line style or use a different character style. Do not change the used character style, it might be needed somewhere else.
Adjust all Paragraph, Character and Cell Styles. (You should always work with them!) E.g. a style property could be in Paragraph or Character Styles to Change text to Caps.
Save it as a new template INDT and use that.
Hi, Laubender and Willi Adelberger.
Following your helpful advice I have been able to make the modifications I needed to the template. It is now formatted just as I need it.
Thank you very much for your help and for taking the time to answer my question.