Open the pages panel window pages and select the thumbnails for the pages you wish to change.
Indesign margin and gutter.
Use the align functions to align to dartboard.
When you re done and you export your pdf you ll have it sized and ready for full bleed printing.
Use the transform panel to determine the exact with and height of your outer margins.
210x297 less 10mm each side would be 190x277.
Enter values for top bottom left and right margins as well as the number of columns and the gutter the space between columns.
Choose layout margins and columns.
Indesign uses the first definition in margins and columns so i m going to guess that is what your question is about.
Select format document margins and assign margins that include the additional bleed example.
Gutters and full bleed.
Because adobe indesign layout pages can include column guides as well as margin guides you can establish the gutter dimensions for a variety of layout options within one set of guides.
Gutter widths should relate to the body text leading value.
Ungroup the object and select all the inner lines.
0 5 inch margins become 0 625 inch from there drop your content and get to formatting.
Use margins and column guides to position content.
Assuming i guessed correctly are you trying to define the gutter width or gutter position.
To adjust column guides manually drag them horizontally to new positions producing unequal widths.