NormandC: Thanks for this response. Your first paragraph suggested I should select the object, then go into Property view, Position... Then change the coordinates of the cylinder to some negative numbers to move it down and to the left as in the tutorial video. Screenshot_CYLINDER_SEPARATED_FROM_CUB...

OS: Linux Mint 18.3 Sylvia Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.16.6712 (Git) Build type: None Branch: releases/FreeCAD-0-16 Hash: da2d364457257a7a8c6fb2137cea12c45becd71a Python version: 2.7.12 Qt version: 4.8.7 Coin version: 4.0.0a OCC version: 6.8.0.oce-0.17 I am follow...

I think now the problem at the time was that I was accessing the tutorial on the web from inside the FCAD screen. It went blank because it was loading.

Now I access the tutorials on the web separately.

So I think this problem is solved.

Thanks to Chrisb and NormandC for their help.

OS: Linux Mint 18.3 Sylvia Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.16.6712 (Git) Build type: None Branch: releases/FreeCAD-0-16 Hash: da2d364457257a7a8c6fb2137cea12c45becd71a Python version: 2.7.12 Qt version: 4.8.7 Coin version: 4.0.0a OCC version: 6.8.0.oce-0.17 I began the...