In layout view some of my layers do not show up. However if I zoom to extent the layer will appear, but as soon as I zoom back in the layer disappears. There is no definition query or scale range selected.
I also have a layer in my main map that does not show up in the table of contents on my layout map.
Computer: Lenovo E560
Processor: Intel (R) Core (TM) i5-6200U CPU @ 2.3GHz 2.40 GHz
Installed Memory (Ram): 8.00 GB (7.49 usable)
System Type: 64 bit Operating system, x64-based processor
Video Card: Intel (R) HD Graphics 520
Download speed: 3.9 Mbps
Upload speed: 4.7 Mbps