Need to select large diapason

This is not really a question about LibreOffice but how you use a computer or spreadsheet more generally. There are various techniques you could use. (But you do not mention your operating system, which may make a difference.) Try one of these:

o Highlight cell C2. Scroll down to row 150240. Hold down Shift while you click on cell C150240.

o Is row 150240 the last row containing any entry in column C? If so, first highlight cell C2 and then press Ctrl+Shift+down-arrow.

o Is row 150240 the last row containing any entry? If so, first highlight cell C2 and then press Ctrl+Shift+PageDown. If this causes the selection to include rows to the right of C, hold down Shift and use left-arrow to reduce the selection to a single column.

o Give your required range a name. To do this, highlight cell C2 and go to Insert | Names > | Define... . In the Name box, enter a name. The "Assigned to" box will show something like "$Sheet1.$C$2". Modify this to read "$Sheet1.$C$2:$C$150240" (without the quotation marks). Click OK. Your required range now has a name. To select the range, click the down-arrow to the right of the Name box (at the left of the Input Line) and select your new name from the drop-down menu.

I trust this helps.

Brian Barker

It would be nice to implement this feature in LibreOffice. For example from
menu Edit->Select->Select Diapason.

I like this one. But in my version 5.1.6.2, although the F1 Help gives
the same as you quoted [Insert | Names > | Define ...], the actual offer
in the spreadsheet is slightly different :

Insert | Named Expressions > | Define ...

Philip