Unitech PA950 - Manual (Page 20)

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If you are unable to beam information between two devices, try the
following:
Transfer only one file, or no more than 25 contact cards, at a time.
When using IR, make sure nothing is between the two IR ports.
Adjust the room lighting or move to another location (some types of light
interfere with beaming).
Use a Program
You do not need to exit a program to open another or to conserve
memory. The system manages memory automatically. To switch between
programs, tap or press a hardware program button.
To switch to or close programs manually, tap > Settings >
System tab > Memory > Running Programs tab.
See Also: Find a File or an Item
Use the Input Panel
Show and hide the input panel
Change the input method
Use the keyboard
Use Block Recognizer