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information interface of the current e-book
: to enter the GPS card path interface.
SDMEM : to enter the data folders list step by step and finally enter e-book list.
File : to enter viewer interface again and display the e-book of this file.
: to the home page.
: to automatically slide page upward or stop sliding.
: to the end page.
: to previous page.
: to next page.
: to pop up the information interface of the current e-book.
: to pop up the e-book setting interface.
: to exit viewer interface to source menu.
: to exit the information interface of the current e-book to viewer interface.
: touch it to open the scroll speed list and then touch one of them to set it.
: touch it to open the font size list and then touch one of them to set it.
: to pop up the word color setting interface.
: to pop up the background color setting interface.
: to confirm the setting and exit to viewer interface.
: to exit to viewer interface.
R slide bar : to set tint of red color.
G slide bar : to set tint of green color.
B slide bar : to set tint of blue color.
: to confirm setting and exit to the e-book setting interface.
: to exit to the e-book setting interface.
E-book setting interface
Word color setting interface
Background color setting interface
Operation of GPS module