Step-by-step guide Creating and editing an event

Upload images of the event

Main image, square image and gallery are managed in the Add event image section of the Event page step. Formats, real weight and size limits, how to delete or download, the Event Gallery Management window and Publish Images Only to update photos from an event already online.

6 min read Published on September 9, 2026

Images are the first element fans see on cards and the event page. The main image is mandatory to publish; the square image and the gallery are optional but improve the performance in the app, in the social previews and in the Event photos section of the public page. Each upload is saved immediately, without pressing anything else.

At a glance

  • Where: event editor → step Event page → section Add event image (Upload and manage the main image, the square format and the event gallery.).
  • Permissions: Manage events.
  • Formats: JPG, JPEG, PNG, GIF, WEBP, AVIF, HEIC, HEIF. Limits: 20 MB per file; source up to 128 megapixels; decoded frame up to 64 megapixels and 30000 pixels per side; animated images with a maximum of 16 frames.
  • Event already online: the new images remain in draft until you send them with Publish changes or with Publish images only.

The three images

ImageWhere it is usedNotes
Image (Add a photo to show the topic of your event.)Cover of the event page and site cards.Required to publish: without appearing To publish an event, you must add at least one image. Return to the event details tab and upload an image.
Square image (optional) (Add only if you want to better control square previews and cards.)Compact previews, cards and social surfaces in 1:1 format.Optional: if you don't upload it, the main image is used when possible. If the file you upload is not already 1:1, it is cropped in the center, keeping the most suitable side and cutting only the excess.
Photo gallery (Manage and upload additional images for your event.)Event photos section of the app's public page and gallery.More images; It is managed from the Event gallery management window, available only after the creation of the draft.

Step by step on the website

  1. Open the section. In the Event page step go to Add event image. What you see: the area Drag the main image here with the Load image button, and below two foldable panels: 1:1 Square image (optional) and Photo gallery.
  2. Load the main image. Drag the file into the area or press Load image and choose the file. What you see: the progress bar and then the preview with two buttons: Delete image and Download image. The rescue is immediate.
  3. Load square image (optional). Open the Square Image (optional) panel, drag the file to Drag 1:1 square image here or press Load square image. Here too you will find Delete image and Download image.
  4. Manage the gallery. Open the Photo gallery panel and press Manage event gallery. What do you see: the Event Gallery Management window with the Drag gallery images here area, the Upload images button (you can select multiple files together) and, when there are photos, Delete all images; each photo has Delete Image and Download Image. Close the window: the gallery previews appear under the panel.
  5. Replace or delete. To change the main or square image press Delete image (confirmations Are you sure you want to delete this image? and Do you want to delete the square image of the event?) and upload the new file; in the gallery each deletion asks Are you sure you want to delete this image from the gallery? and Delete all images asks Are you sure you want to delete all the images in the gallery?

Images of an event already published

  1. Upload or delete images as above: the public page does not change until you publish.
  2. If you want to update only the photos, press Publish images only (at the bottom of the Event page, Add tickets and Publish steps, next to Publish changes): Send only the main image, square image and gallery of this draft for review, without the other changes and without complete validation of the event. Confirmation: Images sent for review.
  3. The button appears only if the event is already online, there is no ongoing review, the images in the draft are different from those published and the draft still has a main image (publishing only images cannot remove the last main image online).

Messages and errors

MessageWhy it appearsWhat to do
The selected image exceeds the 20 MB limit.The file weighs more than 20 MB.Export to JPEG or reduce the quality.
Image format not supported. Use one of these formats: JPG, JPEG, PNG, GIF, WEBP, AVIF, HEIC, HEIF.Not allowed file extension or type.Convert the file.
The image exceeds 128 megapixels: reduce it before uploading.The declared resolution of the file is too high.Resize the image.
The image exceeds 64 megapixels or 30000 pixels per side: export it to JPEG or reduce it before uploading.The frame to be processed is too large (typical of PNG, WEBP, HEIC or very high resolution GIF).Export to JPEG or reduce the size.
The animated image has too many frames: the maximum is 16.Animated GIF or WEBP with more than 16 frames.Use a static image or reduce the frames.
The file is not a valid image or is corrupted.The file is not readable as an image.Re-export the file and try again.
The request exceeds the maximum size allowed.The upload as a whole exceeds 20 MB plus 2 MB of headers.Please reduce the file.
An operation on the images is already underway. Please wait a few seconds and try again.Another upload or delete on the same event is still in progress.Please wait and try again.
Loading took too long. Please check your connection and try again.Exceeded waiting 120 seconds to upload.Check your network or reduce the file.
Your session has expired. Log in again to continue.Your site session is no longer valid.Log in again and reload the page.
Publish the event first: this action only updates the images of an event that is already online.You used Publish only images on an event that has never been published.Use Publish event.
There is already a review in progress: wait for approval before sending the images.A review is already open.Wait for the outcome or cancel the review.
There are no changes to the images to publish.The images in the draft match those online.Upload or delete an image first.
You need a main image to publish images.The draft no longer has a main image.Upload one.
Unable to send images for review. Please try again.Temporary error while sending.Please try again; if it persists use Publish changes.

Special cases

  • Photos of the evening after the event. You can add them to the gallery and send them with Publish images only as for any online event.
  • The Event Gallery Management button is disabled. The draft does not yet have an identifier: save the step data first, then try again.
  • You want a copy of an uploaded image. Use Download Image on the preview.

Rules and limits

  • Allowed formats: JPG, JPEG, PNG, GIF, WEBP, AVIF, HEIC, HEIF; maximum 20 MB per file.
  • Resolution: source up to 128 megapixels; frame up to 64 megapixels and 30000 pixels per side; maximum 16 frames for animated images.
  • One load at a time per event: image operations are serialized.
  • Only use images that you have rights to use.

Related articles

  • Fill in the event page: title, description, dates, location and FAQ
  • Edit an already published event
  • Create a new event

Need more help?

Get in touch with our support team

Contact us