docs: upload csv

Signed-off-by: Raju Udava <86527202+dstala@users.noreply.github.com>

packages/noco-docs/docs/050.tables/030.create-table-via-import.md

@@ -57,3 +57,7 @@ There are two ways to upload source file:
 - `Auto select field types` - enabled by default. If checked, field types will be detected. Otherwise, all fields will default to `SingleLineText`.
 - `Use first row as headers` - enabled by default. If checked, the first row will be treated as header row & will be used as field names.
 - `Import data` - enabled by default. If checked, all data will be imported; otherwise, only table will be created.
+
+:::info
+By default, the first column will be chosen as Display Value and cannot be deleted.
+:::

packages/noco-docs/docs/050.tables/040.import-data-into-existing-table.md

@@ -30,11 +30,11 @@ There are two ways to upload source file:
 3. [Advance Settings](#advance-settings) (optional)
 4. Click on `Import` button.
 
-### Field mapping
+![image](/img/v2/upload-csv-url.png)
-1. Existing column names are listed under `Source column`. New columns identified from the import file under `Destination column`. NocoDB autofill destination column names based on the source column names.
-2. 
-
 
+### Field mapping
+1. Existing column names are listed under `Source column`. New columns identified from the import file are listed under `Destination column`. NocoDB auto maps destination column names based on the source column names. One can reconfigure mapping by making use of dropdown that appears on clicking destination column. Checkbox is provided to exclude a column from being imported.
+2. Click on `Import` button to start importing the file.
 
 ![image](/img/v2/upload-csv-3.png)