Samsung S-Patch3 User Manual page 13

D.4. ECG View's Background:
BLACK: black background, green signal
PAPER: ECG Paper background, black signal
D.5. Import from file: read signal data from stored file. S-PATCH format(*.sp) and MIT
BIH format(.hea/.dat, 16 format - only for exported by this app) can be loaded.
If there is no folder stored signal files, check your system options like below. In case of
Android OS, Internal Storage would be hidden.
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