Delete specific COLUMNS from a ROW. Data Source : SharePoint List

[AdityaDani]

I have an NewForm whose DataSource is Final_Master(SharePoint List). And I am Submitting it using SubmitForm() function.

This form has 6 text Box and 3 Combo Box(Choice Columns in SharePoint List)

Issue 1 : Now I want to Add/Delete options inside the combo box  so that when a user is filling the form he can have the updated options to select from.

• For this I plan to navigate the user to a screen where he can ADD/ DELETE options for the dropdown. I plan to create a Gallery having only one column and for each row I have option to delete the row.
• How do I delete a specific column from a row. Because with the Remove() function I am able to delete the entire ROW. But I want to delete on a column from that row.
• And have a add button clicking on which I navigate to a NewForm where user can add new record into that column.
• But how to push data into the choice column into the List from a text box in PowerApps Form.

issue 2 : The reason i am using a combo box instead of a Drop down is with combo box i will see only the unique records.

Please help.

[Drrickryp]

@AdityaDani 

I do not believe that a user can add options in a Choice type column in SharePoint. However, If you changed the column type from Choice to single line of text,  you could use Distinct() to create the options for a dropdown or combobox and Patch() a user created value to that type of column.  It would then be picked up as another option in the dropdown or combobox subsequently.