====== krop ======
  * https://arminstraub.com/software/krop
  * [[:pdf|PDF]] crop 도구
  * 페이지마다 영역을 지정해서 crop 가능.

===== install =====

  * https://snapcraft.io/krop
  * https://flathub.org/apps/details/com.github.arminstraub.krop