Adding Cross Dissolve in Final Cut Pro X

Applying Auto Dissolve or Cross Dissolve to all the clips in Final Cut Pro X.

It's very easy to apply Auto Transitions to all the clips.

Which ever transition you make as default will be applied to all the clips in your project.

By Default Cross Dissolve is auto set.

You can make any transition as Default by going to that transition 

-> Right Click -> Make Default

By this your Default Transition will be changed to the one you made now.

Now import all the clips to your project.

Select all clips (where you want to apply the default selected transition)  and then press Command + T or go to Edit and Select Add Cross Dissolve.