Zero crossing adjust left side to left

`Shift` + `H`

All hotkeys for Adobe Audition CC (MacOS)

Audio General Operations Start/stop playback	`Spacebar`
Audio General Operations Set time indicator to beginning	`Home`
Audio General Operations Set time indicator to end	`End`
Audio General Operations Switch Waveform/Multitrack editor	`8`
Audio General Operations Set time indicator to previous marker/clip	`Command` + `Left Arrow`
Audio General Operations Set time indicator to next marker/clip	`Command` + `Right Arrow`
Audio General Operations Toggle Preference for return cti to start position	`Shift` + `X`
Audio General Operations Zoom in horizontally	`=`
Audio General Operations Zoom in vertically	`Option` + `=`
Audio General Operations Zoom out horizontally	`-`
Audio General Operations Zoom out vertically	`Option` + `-`
Audio Editing Operations Repeat previous command with clicking OK	`Shift` + `R`
Audio Editing Operations Repeat previous command with not clicking OK	`Command` + `R`
Audio Editing Operations Open Convert sample type dialog box	`Shift` + `T`
Audio Editing Operations Capture noise reduction profile	`Shift` + `P`
Audio Editing Operations Activate left channel for editing	`Up Arrow`
Audio Editing Operations Activate right channel for editing	`Down Arrow`
Audio Editing Operations Make display more logarithmic	`Command` + `Option` + `Up Arrow`
Audio Editing Operations Make display more linear	`Command` + `Option` + `Down Arrow`
Audio Editing Operations Make display full logarithmic	`Command` + `Option` + `PgUp`
Audio Editing Operations Make display full linear	`Command` + `Option` + `PgDn`
Audio Editing Operations Increse/Decrese spectral resolution	`Shift` + `Command` + `Up Arrow` / `Down Arrow`
Audio Editing Operations Repeat last command	`Command` + `R`
Mixing Tracks Select the same input/output for all audio track	`Command` + `Shift` + `Select`
Mixing Tracks Activate or deactivate mute/solo/record tracks	`Command` + `Shift` + `Click`
Mixing Tracks Adjust Knob in large increment	`Shift` + `Drag`
Mixing Tracks Adjust knob in small increment	`Command` + `Drag`
Mixing Tracks Maintain time position	`Shift` + `Drag`
Mixing Tracks Reposition envelop segment without Keyframe	`Command` + `Drag`
Mixing Tracks Nudge Selected clip to left	`Option` + `,`
Mixing Tracks Nudge Selected clip to right	`Option` + `Period`
Marker/Tool/Clip Shortcuts Add marker	`M` / `*`
Marker/Tool/Clip Shortcuts Move to next marker	`Command` + `Option` + `Right Arrow`
Marker/Tool/Clip Shortcuts Move to previous marker	`Command` + `Option` + `Left Arrow`
Marker/Tool/Clip Shortcuts Clip gain	`Command` + `G`
Marker/Tool/Clip Shortcuts Split	`Command` + `K`
Marker/Tool/Clip Shortcuts Delete Selected marker	`Command` + `0`
Marker/Tool/Clip Shortcuts Delete All Marker	`Command` + `Option` + `0`
Marker/Tool/Clip Shortcuts Rename selected marker	`/`
Marker/Tool/Clip Shortcuts Select all	`Command` + `A`
Marker/Tool/Clip Shortcuts Deselect All	`Command` + `Shift` + `A`
Marker/Tool/Clip Shortcuts Spot Healing Brush	`B`
Marker/Tool/Clip Shortcuts Ripple delete selected clip	`Shift` + `Del`
Marker/Tool/Clip Shortcuts Time selection in selected clip	`Option` + `Del`
Marker/Tool/Clip Shortcuts Time selection in all track	`Command` + `Option` + `Del`
Marker/Tool/Clip Shortcuts Copy	`Command` + `C`
Marker/Tool/Clip Shortcuts Copy to new	`Option` + `Shift` + `C`
Marker/Tool/Clip Shortcuts Lasso selection tool	`D`
Marker/Tool/Clip Shortcuts Delete	`Del`
Marker/Tool/Clip Shortcuts Mark selection tool	`E`
Marker/Tool/Clip Shortcuts Edit original	`Command` + `E`
Marker/Tool/Clip Shortcuts Clear time selection	`Esc`
Marker/Tool/Clip Shortcuts Zero crossing adjust left side to left	`Shift` + `H`
Marker/Tool/Clip Shortcuts Zero crossing adjust selection inward	`Shift` + `I`
Marker/Tool/Clip Shortcuts Zero crossing adjust left side to right	`Shift` + `J`
Marker/Tool/Clip Shortcuts Copy/Cut/Paste	`Command` + `C` / `Command` + `X` / `Command` + `V`
Marker/Tool/Clip Shortcuts Mix Paste	`Command` + `Shift` + `V`
Marker/Tool/Clip Shortcuts Undo	`Command` + `Z`
Marker/Tool/Clip Shortcuts Redo	`Command` + `Shift` + `Z`
Marker/Tool/Clip Shortcuts Select frequency selection tool	`F`
Marker/Tool/Clip Shortcuts Select rectangular marquee tool	`R`
Marker/Tool/Clip Shortcuts Snapping enabled	`S`
Marker/Tool/Clip Shortcuts Crop	`Command` + `T`
Marker/Tool/Clip Shortcuts Razor tool	`R`
Marker/Tool/Clip Shortcuts Move tool	`V`
Marker/Tool/Clip Shortcuts Slip tool	`Y`
Marker/Tool/Clip Shortcuts Paintbrush selection tool	`P`