Right click < show hidden lines

I'm having some trouble with SolidWorks and I was wondering if anyone has come across this problem and had a work around for it:

This is what I used to be able to do:

When editing a part you can select to choose to show hidden sketches or hide them

When in an assembly you can select the sketch within a part and choose to show or hide sketches (contained within the part)

That's all fine up until today when I try and do this from an assembly it won't show the sketch I want to display, but it works when I load the part independently from the assembly

I have found this on the forum:

https://forum.solidworks.com/message/331385

I am using SolidWorks Student Edition 2013-2014

SolidworksDrawings And Detailing