Keys
----
<F8> save screenshot to 'Snap' sub directory
<ALT>+<ENTER> switch between window/fullscreen mode
<SHIFT> + <PAGE UP> Turn off screen smoothing
<INSERT> show/hide the gpu version (if no FPS is displayed) or an help text
(if the FPS menu is displayed)
<DEL> show/hide FPS and option menu
How it works: Hit <DEL> and the Framerate und the menu will appear. It
looks like: 'FPS XXXX.X FL< FS OD FI DI AM AB FA FT GF 0 * 2x Ax'

What does it all mean? Here's the legend:

FPS: frames per second, higher means better
FL : Frame rate limiter (none, manual, auto-detect)
FS : Frame skipping
OD : Offscreen drawing (none, minimum, standard, enhanced, extended)
AM : Alpha multipass
FI : Filtering (none, standard, extended, std without sprites, ext w/o sprites, std+smoothed sprites, ext+smoothed sprites)
AB : Advanced blending (off, software, hardware)
FA : Framebuffer access (emulated vram, reads, moves, reads&moves, FVP)
FT : Framebuffer texture (emulated vram, black, gfx card buffer, gfx card buffer + software)
GF : Special game fixes
DI : Dithering
0 : Screen smoothing
: Smiley: mmm... not used with d3d yet, I think
[] : Filled Smiley: palettized texture windows support
* : Shining sun... "Hardware" Advanced blending is activated and supported nicely with your card
2x : 2xSaI hi-res textures
A/D/G/Mx : Analog/Digital/Gun/Mouse mode and pad number. If the main can tell the gpu the pad mode, the proper info will get displayed M : PSX Mouse mode activated (otherwise the emu is using a digital pad mode)
< : Arrow for selecting

Below every option there is a small box, if the box is filled the option
is active, empty box means inactive.
There is a small arrow you can move with the <PAGE UP> or <PAGE DOWN> keys
to an option you want to toggle.
Just hit the <END>/<HOME> key to switch the selected option on or off. Changes will
be done immediatly, you can see how the framerate is affected if an option
is on or off.
If you are using a manual speed limit, and the in-game menu cursor is set to FL, you
can adjust the manual limit value by hitting <SHIFT>+ <END>/<HOME>.
If you have found a setting that suits your game just hide the menu by
pressing <DEL> again.
I don't store changed options permanently, you have to do that still in the
main configuration dialog.