Affichage illisible

bonjour,
depuis que je travail sur iMac (Retina 5K, 27 pouces, end 2015)
l’affichage des lignes et des repères est trop fin et illisible
est il possible de modifier cet affichage?
merci

SketchUp 2017 has support for high resolution displays. Upgrading should take care of the problem.

This topic has a link (in post no. 5) to larger inference point images for iMac with hi-res screen.

It works well for both SU 2015 & 2016.