There is no checkbox in my Global Game Settings to toggle all errors.
There is a Graphics tab, a "Other" tab, a "Loading" tab, and an "Info" tab.
The graphics tab is the one with the most options, here's what it's got:
-start in fullscreen mode
-scaling (radio button) fixed scale, and a field for percentage, a keep aspect ration (default), and full-scale
-interpolate colors between pixels (checked)
color outside room region
-allow the player to resize game window
-let the game window always stay on top
-don't draw a border in windowed mode (checked)
-don't show the buttons in the window caption (checked)
-display the cursor (checked)
-freeze the game when the form loses focus (checked)
-disable screensavers & power saving actions (checked)
The "Other" tab has:
-Let ESC end the game (checked)
--Treat the close button as ESC key (checked)
-Let F1 show the game information (checked)
-Let F4 switch between screen modes
-Let F5 save the game and F6 load a game
-Let F9 take a screenshot of the game (checked)
Loading tab:
-show your own image while loading
--make image partially transparent
--make translucent with alpha value (255)
Radio button for loading:
-no loading progress bar (chosen)
-default loading progress bar
-own loading progress bar
--scale progress bar image
Game Icon (red circle)
Game Identifier (900001)
An "Info" Tab.
So yeah... no "Show all errors" section anywhere in Global Game Settings.