Answers.Body: <p>Of course, just create a new asset source (settings > volumes > new volume) 
  then in your image field select 'Restrict uploads to a single folder' in your field and then select the asset source you just created.</p>
  
  <p><a href="https://i.sstatic.net/icjm1.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/icjm1.png" alt="enter image description here"></a></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-06-06T22:37:05.620Z
Answers.Text: Basically what you mean is to create a Asset field which source is based on another volume. But what I need is a new Asset field type and its source is another Asset field in the same entry.
  
  Let's say when a user open a entry editing page, he selected three images to field A, Ctrl+s to save. Then he can only select these three images to field B.
Answers.UserDisplayName: yu xia
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-06-06T13:05:06.747Z
Answers.LastActivityDate: 2018-06-06T13:05:06.747Z
Answers.UserDisplayName: Seth Warburton
Body: <p>Now I have a "gallery image" field which allows users to upload multiple images, and some "single-upload image field" in matrix block. </p>
  
  <p>For "single-upload image field", I want to force users to choose images only from the "gallery image" field.</p>
  
  <p>To do that, I want to create a custom asset source called "gallery image". So with this source selected, I can limit the source of "single-upload image field".</p>
  
  <p>Any idea to achieve this? Thanks!</p>
  
Tags: <assets><sources><assets-field>
Title: How can I create a new asset source?
ThreadText: # How can I create a new asset source?
  
  (Asked by: username_0 on 2018-05-30)
  
  Now I have a "gallery image" field which allows users to upload multiple images, and some "single-upload image field" in matrix block.
  
  For "single-upload image field", I want to force users to choose images only from the "gallery image" field.
  
  To do that, I want to create a custom asset source called "gallery image". So with this source selected, I can limit the source of "single-upload image field".
  
  Any idea to achieve this? Thanks!
  
  **Tags:** assets, sources, assets-field
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2018-06-06. Score: 1
  
  Of course, just create a new asset source (settings > volumes > new volume)
  then in your image field select 'Restrict uploads to a single folder' in your field and then select the asset source you just created.
  
  [![enter image description here](https://i.sstatic.net/icjm1.png)](https://i.sstatic.net/icjm1.png)
  
  > **Comments:**
  > **username_0**: Basically what you mean is to create a Asset field which source is based on another volume. But what I need is a new Asset field type and its source is another Asset field in the same entry.  Let's say when a user open a entry editing page, he selected three images to field A, Ctrl+s to save. Then he can only select these three images to field B.  
  
  ---
  
  