From the home screen, tap the cog icon ( ⚙️ ) in the bottom right corner to open the settings page.
To view your transaction limits, tap on 'Account limits'.
This will display your transaction limits for bitcoin on-chain transactions plus all fiat (GBP/EUR, etc) transactions under the 'Payments and trades' section.
There are separate limits imposed on bitcoin lightning network transactions shown in the 'Lightning transactions' section.
The progress bars beneath both your 'Payments and trades' and your 'Lightning transactions' are an indication of how close you are to reaching your transaction limits.
If it completely fills then you have reached your daily limit and will have to wait until the next day (midnight) to start sending/depositing funds again.
📖 To find out more about transaction limits, please tap here.