You can import a Tiles layout (tile sizes, names, view types, real-time expressions, etc.) from another data bucket by
1. Clicking the "settings" link underneath the bucket name on the bucket shelf
2. Clicking on the "Import View" button
3. Selecting the data bucket to import a view from
4. Clicking the "Import" button
This will overwrite the existing layout of the current data bucket with the layout from the source bucket. If the source data bucket has different signal keys/names than the source layout view, simply modify the tile configuration for each tile with the correct signal key. This option allows you to build a single dashboard layout and quickly apply that layout across as many datasets as desired.
Related: Duplicate a Layout to Another Data Bucket
Related: Create Multiple Dashboards from One Data Bucket