Overlays and the special current page node offers precise control of placement on a page. One application is to create exam sheets where candidate details can be hidden using a dog ears technique.

Edit and compile if you like:
% Exam sheet% Author: Alain Matthes% Requires pdflatex and two compilations to place the overlays correctly\documentclass{article}\usepackage{tikz}\begin{document}\thispagestyle{empty}\begin{tikzpicture}[remember picture, overlay]\node [shift={(-8 cm,-8cm)}] at (current page.north east){%\begin{tikzpicture}[remember picture, overlay]\draw(0,0) rectangle (8,8);\draw [fill=gray] (0,8) -- (8,8) -- (8,0) -- cycle ;\path[coordinate]\foreach \k in {1,...,4}{%(0 pt,8cm -\k *1.2cm) coordinate (d\k)} ;\path[clip] (0,0) rectangle (8,8);\foreach \k/\t in {1/Last Name,2/First Name,3/Birthday,4/Date}{%\node[inner sep=0pt,rotate=-45,%right=0.5cm,minimum height=12pt](f\k) at (d\k) {\t};\draw (f\k.south east)-- (8cm -\k * 1.2cm,-6pt );}\end{tikzpicture}};% Draw a page border\draw (current page.north west) rectangle (current page.south east);\end{tikzpicture}\end{document}
Click to download: exam-sheet.tex • exam-sheet.pdf
Open in Overleaf: exam-sheet.tex