Hi, it tried to do a \atpage command that results a) some page => nothing b) different page => pagenumber with some text (e.g. "auf Seite XY") \def\atPage[#1]% {\doifnot{\at[#1]}{\currentpage}% {\at[#1]}% } My problem with this is, that the \doifnot always results as not equal; it is like the types mismatch as if I exchange \at[#1] with a pure number the comparing works. If so, how can the types be corrected? Additionally - if possible - I would like to add case that the referred page is on the other page but in duplex mode adjacent to the actual page. Is that possible to do this? I unluckily dont know how to make working simple calculation in tex code. To be complete I found in the file strc-ref.mkiv some notes about a planed \atpage command: %D A still very rudimentary|/|experimental forward|/|backward %D reference mechanism is provided by the macro \type{\atpage}: %D %D \starttyping %D ... \somewhere{backward text}{forward text}[someref] ... %D ... \atpage[someref] ... %D \stoptyping %D %D In future versions there will be more sophisticated % 0 = no page reference % 1 = same page % 2 = preceding page % 3 = following page % 4 = backward, same page (todo) % 5 = forward, same page (todo) But that level of the ambient tex is still out of my scope. Thanks P.