Describe the feature and the current behavior/state

In gereral if I choose a grid with m columns for the (windowed) pdfviewer then the first m pages of the document should be presented in the first row of the grid (i.e. start in the left column). I wish to choose at which column n (with 1 <= n <= m) the first page should be shown. The first n-1 columns of the first row should be empty. The value n should be remembered. If grid option "single page step" applies, first page shouldn't be moved to the right by this option.

A typical use case is a two column page grid (n=2). Be aware that ecaxtly in this case the current version of texstudio always shows the first page in the second column, in all other cases (n not equal to 2) the first page shows in the first column. If you want to see at the same time front (say with exercises) and back (say with solutions) of a sheet of paper, then the page sequence should start showing in column 1 (i.e. odd page numbers at left, even page numbers at right). But if you view a book, page sequence should start in column two (i.e. odd page numbers at right, even page numers at left). This could be done in this way: If I klick (in the pdfviewer) with the right mouse button in column n of the grid (in any row) then the menu should show the option "Put first page in this column".

Who will benefit with this feature?

Anyone, because currently (as far as I know) the only way to view documents in a 2 column grid with first page at left is to choose option "single page step" in the grid menu. But this has the disadvantage that you can't scroll two pages at once, like you do with books. In general in a grid with r rows we want to scroll r rows at a time, so we don't want to choose this option.