When working in InDesign for web use the actual size of the working document is larger than should be.
The final output is the correct size in pixels but working at 100% magnification and 'Actual size' the document is not representational of its true size.
I have created the document for web, I have the ruler set to pixels, at 100% and actual size but I know that the size of say 500px on the screen is much larger that 500px, probably reaching double that.
I am working on a 27" iMac with the correct resolution set up - my Photoshop documents are showing the true pixel size so I think it's certainly a setting in InDesign.
Does anyone have any idea what's causng this magnification?