http://av_jpn_support_panasonic_com/support/global/cs/dsc/download/fts/dl/g9.html

Improvement of AF performance
- AF tracking performance in video recording has been improved.Improvement of Body I.S.(Image Stabilizer) performance
- There were cases where peripheral distortion occurred in video recording while walking when used with Panasonic wide zoom lenses (H-F007014, H-E08018). This bug has been fixed.

Improvement of High Resolution Mode
- Performance of motion correction has been improved.
- Minimum F11 aperture can be used.
- There were cases where the High Resolution Mode is force-quit when switching to playback mode. This bug has been fixed.

Improvement of sound recording performance
- Sound quality has been improved by optimizing the noise reduction performance of internal noise cancelling microphone.
New functions

- [L.Monochrome D] has been added to Photo Style.

- [Grain Effect] can be added and adjusted in Photo Style.

- [Live View Boost] has been added, which makes it easy to check the composition on the monitor in low-light environment.

- Maximum 20x enlarged view is available in [MF Assist].

- [Focus Ring Lock] has been added to [Custom] menu, which disables focus ring operation to lock the focus.

- [WB/ISO/Expo. Button] has been added, which enables adjustment of WB/ISO/Exposure only while the exposure compensation button is pressed. This can be set [Custom]>[Operation].

- [Dial] has been added to [Custom]>[Operation Lock Setting].

Other improvements
- [Focus Ring Lock], [E-Stabilization(Video)], [Mic Rec Level Disp.], [Live View Boost],and [L.Monochrome D] can be assigned to the Fn button that works in recording mode.

- It is possible to choose images from group display such as burst shots in [RAW Processing] mode.

- Restarting time from sleep mode has been shortened while using Image App and Bluetooth connection.

You can choose to shorten the time of remote operation and image transfer or remote shutter control in [Setup]>[Bluetooth]>[Returning from Sleep Mode].

- There were cases where folder name was garbled when connecting wirelessly with Windows10-based PC. This bug has been fixed.