---
schema_version: "1"
id: 58e4a5e97e4e3b9bec38da98328c7ba854de5e528f3d96e9c45ce5fbd45d9bd0
title: Schema Builder Considerations
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/platform/264-0-0/schema_builder_considerations.md
canonical_url: https://help.salesforce.com/s/articleView?id=platform.schema_builder_considerations.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: c2e4bd0280376d94bb644c9696882f826ac1f82e973e3d9a3f26aa9fb03f15ce
description: Keep these items in mind when working with Schema Builder.
products:
  - Salesforce Platform
  - Security
release: "264"
---
# Schema Builder Considerations

Keep these items in mind when working with Schema Builder.

### Required Editions

<table class="slds-table slds-table_bordered slds-max-medium-table_stacked slds-m-bottom_small edition"><colgroup><col></colgroup><tbody><tr class=""><td class="slds-cell-wrap" style="vertical-align:top;">Available in: both Salesforce Classic and Lightning Experience</td></tr><tr class=""><td class="slds-cell-wrap" style="vertical-align:top;">Available in: All Editions</td></tr></tbody></table>

- Schema Builder saves the layout of your schema anytime you move an object.
- If your schema contains many objects and fields, loading can take a long time. Click **Hide Relationships** to improve Schema Builder performance.
- When creating a custom field, ensure that its name and label are unique for that object.
    
    - If a standard and custom field have identical names or labels, the merge field displays the custom field value.
    - If two custom fields have identical names or labels, the merge field can display an unexpected value.
    
    If you create a field label called Email and a standard field labeled Email exists, the merge field is unable to distinguish between the fields. Adding a character to the custom field name makes it unique. For example, Email2.
- You can’t export your schema from Schema Builder (for example, to use the schema in another org).
- When you click **Auto-Layout**, you can’t undo it.
- Objects created outside of Schema Builder, such as through an app or the API, don’t automatically display on the canvas. Select the checkbox for the object created outside Schema Builder to display it on the canvas.
- By default, the field-level security for custom fields is set to visible and editable for internal profiles—those not cloned from Partner User or Customer Portal Manager. Fields that aren’t normally editable, such as formulas and roll-up summary fields, are visible and read only.
- You can’t save the level of zoom when closing Schema Builder.