Create soft focus - Automatic

Step 1 - Open the photo
If it isn't already open, open the photo you wish to modify.
Step 2 - Open the Soft Focus dialog
Choose Adjust > Softness > Soft Focus.
Perform this step for me.
Step 3 - Make dialog settings
Choose the desired settings in the Soft Focus dialog. The preview panel in the upper right displays the effect of your settings.
Step 4 - Click OK to apply
When you're satisfied with the look, click OK to apply the soft focus.
Notes and Tips:
Only one dialog is utilized here, and may not yield the same soft focus results as the Create soft focus - Manual Quick Guide.
As with other dialogs and tools, you may want to save satisfactory settings as a Preset.

Learn More:
Create soft focus - Manual
Create depth of field
Modify a photo via blend modes