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0001 .. meta:: 0002 :description: digiKam Maintenance Tool to Rebuild Thumbnails 0003 :keywords: digiKam, documentation, user manual, photo management, open source, free, learn, easy, maintenance, thumbnails 0004 0005 .. metadata-placeholder 0006 0007 :authors: - digiKam Team 0008 0009 :license: see Credits and License page for details (https://docs.digikam.org/en/credits_license.html) 0010 0011 .. _maintenance_thumbnails: 0012 0013 Rebuild Thumbnails 0014 ================== 0015 0016 .. contents:: 0017 0018 .. figure:: images/maintenance_rebuild_thumbnails.webp 0019 :alt: 0020 :align: center 0021 0022 The digiKam Maintenance Options to Rebuild Thumbnails 0023 0024 Rebuilding the thumbnails might be necessary if you worked on your images with other applications or if you changed the thumbnail size. 0025 0026 From :menuselection:`Settings --> Configure digiKam...` and **Tree-Views** tab from **Views** panel, the option **Use Large Thumbnail Size for High Screen Resolution** can be turned on to render **Icon-View** with large thumbnail size, for example in case of 4K monitor is used. By default this option is turned off and the maximum thumbnail size is limited to 256x256 pixels. 0027 0028 When this option is enabled, thumbnail size can be extended to 512x512 pixels. This option will store more data in thumbnail database and will use more system memory. digiKam needs to be restarted to take effect, and this **Rebuild Thumbnails** tool needs to be processed over whole collections. 0029 0030 .. figure:: images/maintenance_thumbnails_setup.webp 0031 :alt: 0032 :align: center 0033 0034 The digiKam Views Setup Panel and the Large Thumbnail Option 0035 0036 .. important:: 0037 0038 Even if thumbnails are stored in the database using wavelets compression PGF format, large collection can generate huge database storage. Take a care to use a place to store the database with enough space available. 0039 0040 .. note:: 0041 0042 From :menuselection:`Settings --> Configure digiKam...` and **Behaviour** tab from **Miscelleneous** panel, the **Scan** options can speed up the process in the first case or if you just added pictures to your collection. 0043 0044 While the rebuild thumbnails process is under progress, notification on the bottom right of main windows will be visible to indicate the amount of items already done. 0045 0046 .. figure:: images/maintenance_thumbnails_process.webp 0047 :alt: 0048 :align: center 0049 0050 The Rebuild Thumbnails Process Working in the Background 0051 0052 .. note:: 0053 0054 This process can also be directly called by :kbd:`F5` keyboard shortcuts to rebuild thumbnails for the current selected album.