From the TM- D710 Instruction Manual (CD Rom included with the radio), page OP-3
Changing the Frequency Step Size
Choosing the correct frequency step size is essential in selecting your exact frequency. The default step size on the 144 MHz band is 5 kHz (K type) or 12.5 kHz (E, M4 types). The default on the 430/440 MHz band is 25 kHz (K, E types) or 10 kHz (M4 type) .
1 Press the left or right [BAND SEL] to select band A or B, then press [VFO].
2 Enter Menu mode and access Menu 101.
3 Set the step size to 5.0*, 6.25*, or 8.33 kHz (118 MHz band only) or to 10.0, 12.5, 15.0*, 20.0, 25.0, 30.0, 50.0, or 100.0 kHz.
* These step sizes are not available for the 1200 MHz band.
Note: Changing between step sizes may correct the displayed frequency. For example, if 144.995 MHz is displayed with a 5 kHz step size selected, changing to a 12.5 kHz step size corrects the displayed frequency to 144.9875 MHz.
kd5knr thanks man I'm looking at this rig for the Semi I'll be driving and was needing a APRS reporting rig at 50 watts instead of my VX-8R reporting at 5 watts and open up a antenna space instead of running two vhf antennas .