Dear Caitlin,
Good days, thanks for querying in this forum. We’re happy to help you.
From your description, it seems that you are using Multiple text line and you want to display all items.
If my understanding is right, we have also tested it on our side, we created a multiple text line column and we added six lines under such field, however, it only displays 5 lines, as shown below:
We’re afraid that there is no out of box way to display all lines under multiple text field with built-in features. We’d sorry that it doesn’t meet your requirement, we do understand the inconvenience caused and apologize for it.
Personally I completely agree with you, this is indeed a good addition to the current features of SharePoint Online. It would be definitely ideal if we can show all lines. Thank you for bring thing to our attention. We sincerely recommend you go to SharePoint Feedback community to vote this feedback: Add an option to truncate/show all by default "Multiple lines of text" column in a Sharepoint list · Community (microsoft.com) or go to SharePoint feedback community to provide your feedback: SharePoint · Community (microsoft.com).This is the best platform to let related team hear from you and make the products and services better for you and others.
At the same time, per our search, JSON code may help achieve your requirement, you can choose to use the JSON code below to format the multiple line text column:
{ "$schema": "***http://columnformatting.sharepointpnp.com/columnFormattingSchema.json***", "debugMode": true, "elmType": "div", "children": [ { "elmType": "div", "txtContent": "@currentField", "style": { "padding":"11px 8px", "max-height":"64px", "overflow-y":"auto", "align-items":"flex-start" } } ] }
And we have also tested it on our side, it works fine and we can scroll down the single row under multiple line text field. As shown below:
For your reference: SharePoint Online Modern Experience Multi-Line Field Display - Microsoft Community Hub, and if you want to learn more about how to use JSON code, we’d suggest you go to sharepoint-dev - Microsoft Q&A to post a new question, which is specific channel to handle such situation, the engineers in related team will focus on your specific requirement and provide specific suggestions. The engineers over there are more proficient in such codes than we.
If the scenario above is not consistent with yours, you can also post back and point that.
Thanks for your cooperation.
Sincerely,
Sukie | Microsoft Community Moderator