Boot menu

[saiful]

how to go Boot Menu In xperia tx..

i've unlocked bootloader and saw "Bootloader Unlocked : Yes" on service menu....

but i can't enter my bootloader menu.i need help.............

[Uliwooly]

Here you go 

http://developer.sonymobile.com/services/unlock-bootloader/

[saiful]

yes i unlocked bootloader with this official instruction.but my question was hw can i enter boot menu during starting the phone.i heared to do this i've to press and hold some button..but i don't khow which button i should hold and press...