Fix Google Chrome blank/black screen (Facebook video full screen)

Method 1:

• go to Settings -> Show advanced settings...
• uncheck Use hardware acceleration when available

Method 2:

• open your Chrome shortcut and add the following parameter
• -disable-gpu

Method 3:

• open Chrome and go to chrome://flags/
• search for GPU compositing on all pages and disable it

Method 4:

• go to %USERPROFILE%\AppData\Local\Google\Chrome\User Data
• edit file Local State
• add or insert "hardware_acceleration_mode": { "enabled": false },

Add guide lines at document center in Photoshop

• Go to View -> New Guide...
• Select Horizontal
• Position: 50%

repeat the steps for the Vertical guide