have am doing a 747 400 currently I have done all the bits up till the engines.
I keep on trying to add a new cylinder to make the engines of the 747 but it doesnt work in either edit mode and object mode, the dimensions are set to 0 on all axis and whenever I try and change it it wont let me for the cylinder.
However when I try and add a cube, it somewhat shows the cube and not the cylinder.
Here's the link to show all the dimensions are set to 0 and I cant change them. https://gyazo.com/b4d058ce91745538a1c97e88cd8e2fbd