That information is programmed into the layout.nut file usually.
You can add code into it that will display various information wherever on the screen you want it to show up.
Here's some examples of code you can put into that theme's layout.nut file to show information .. you will probably have to adjust the X and Y position and the width/height parameters though to fit that theme.
Sample layout.nut code:
-------------------------------
local flx = fe.layout.width;
local fly = fe.layout.height;
local flw = fe.layout.width;
local flh = fe.layout.height;
// emulator text info
local textemu = fe.add_text( "Emulator: [Emulator]", flx* 0.1625, fly*0.5, flw*0.6, flh*0.025 );
textemu.set_rgb( 255, 255, 255 );
textemu.align = Align.Left;
textemu.word_wrap = false;
// year text info
local texty = fe.add_text("Year: [Year]", flx*0.1625, fly*0.525, flw*0.13, flh*0.025 );
texty.set_rgb( 255, 255, 255 );
texty.align = Align.Left;
// players text info
local textp = fe.add_text("Players: [Players]", flx*0.25, fly*0.525, flw*0.13, flh*0.025 );
textp.set_rgb( 255, 255, 255 );
textp.align = Align.Left;
// played count text info
local textpc = fe.add_text("Played Count: [PlayedCount]", flx*0.35, fly*0.525, flw*0.13, flh*0.025 );
textpc.set_rgb( 255, 255, 255 );
textpc.align = Align.Left;
// display filter info
local filter = fe.add_text( "Filter: [ListFilterName]", flx*0.45, fly*0.525, flw*0.2, flh*0.025 );
filter.set_rgb( 255, 255, 255 );
filter.align = Align.Left;
// manufacturer filter info
local manufact = fe.add_text( "Manufacturer: [Manufacturer]", flx*0.1625, fly*0.55, flw*0.25, flh*0.025 );
manufact.set_rgb( 255, 255, 255 );
manufact.align = Align.Left;
// display game count info
local gamecount = fe.add_text( "Game Count: [ListEntry]-[ListSize]", flx*0.41, fly*0.55, flw*0.5, flh*0.025 );
gamecount.set_rgb( 255, 255, 255 );
gamecount.align = Align.Left;
For the genre icon .. that's another section of code that usually exists in the layout.nut file to match up what is in a romlist file (Category field) to a PNG picture file for display. But you have to make sure to have the PNG files to go along with it.