See table schema changes at a glance
Make changes to table structure easier to understand with a compact visual summary.
Trigger
Table Schema Changed
Polling trigger that detects when a table's schema changes in Google Sheets. Monitors columns added/removed/renamed and inferred type/format changes. Uses snapshot-based diffing to compare schemas between polls.
Action
Convert HTML to PNG
Tool to convert HTML string to PNG image. Use when you need a PNG from HTML after preparing your markup.
Why this helps
A renamed or removed column can disrupt downstream work before anyone spots the change.
- Surface detected column changes in a visual summary.
- Make schema updates easier to share with collaborators.
- Catch structural changes before they cause confusion.
Setup
Build it in a few focused steps.
- 1Connect Google Sheets and CustomJS once in the Notis portal.
- 2Create an automation named Table schema visual note.
- 3Tell Notis to summarize the detected schema changes as a clear PNG image.
- 4Pick the Google Sheets Table Schema Changed trigger.
- 5Choose a report channel, then test with one real schema change.
Questions about this workflow
What schema changes can start this?
The trigger monitors columns added, removed, or renamed, plus inferred type or format changes.
Does this detect ordinary cell value changes?
This trigger focuses on table schema. Use a range or row change trigger for cell values.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Google Sheets to Customjs. A trigger fires from one place; an action lands in another.
Google Sheets triggers
Customjs actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
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Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
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Aggregate Metric Changed
Triggers when an aggregate metric (SUM/COUNT/AVG/MIN/MAX) changes in a Google Sheets spreadsheet. This trigger monitors an aggregate calculation on a target column (optionally filtered by a search column/value) and fires when the calculated result changes.
Convert HTML to PNG
Tool to convert HTML string to PNG image. Use when you need a PNG from HTML after preparing your markup.
Cell Range Values Changed
Triggers when values in a specified A1 range change in Google Sheets. This trigger monitors a specific cell or range of cells and fires when any values change.
Capture webpage screenshot
Tool to capture a screenshot of a webpage. Use when you need a visual snapshot of a URL.
Conditional Format Rule Changed
Triggers when conditional formatting rules change in a Google Spreadsheet. Detects when rules are added, updated, or removed. Uses snapshot-based diffing to detect changes between polls.
Merge multiple PDFs into one
Tool to merge multiple PDF files into a single PDF. Use when you have multiple PDF URLs and want one combined PDF.
Data Validation Rule Changed
Triggers when data validation rules change (added/updated/removed) in a Google Spreadsheet. Uses snapshot-based diffing to detect changes between polls.
Run Puppeteer Script
Tool to run a Puppeteer script and capture a screenshot. Use when automating headless browser tasks and needing a PNG output. Use after confirming the script logic.
Developer Metadata Changed
Triggers when developer metadata entries change (new/updated/removed) in a Google Spreadsheet. Uses snapshot-based diffing to detect changes between polls.
Filtered Range Values Changed
Polling trigger that monitors Google Sheets filtered ranges for value changes. Uses snapshot-based diffing to detect when values matching a data filter change. Emits the matched values when changes are detected.
Connect any two apps with Notis in the middle.
Google Sheets and Customjs, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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