Transform Data - Remove Multiple Rows

Good morning,

Thanks to everyone who has answered my recent queries on this forum, they've really helped me get going with Power Bi.

So I'm hoping somebody can also tell me what I'm missing here, before I import a spreadsheet to work with I gather the data can be transformed but I can't see how to remove multiple rows.  Like, I don't want rows 1-10 but can't see how to take them away in one go.

I'm sure there's something simple that I'm not seeing so if anybody knows that would be appreciated.

Thanks in advance