The navigation title (iOS) or sidebar title (macOS) of the main app view shows the currently selected provider and the default model.
To switch between providers, long-press (iOS) or click and hold (macOS) the compose button. This will open a menu where you can select a different default provider.
Long press (iOS) or right-click (macOS) on a conversation to show the context menu with options to mark the conversation as favorite, delete, or rename.
At the top of the Chat view you can see the model used for this conversation. Tap on it to switch to a different model with an option to save it as default for this provider.
In the top right corner menu you can adjust the text size, mark the conversation as favorite, copy the full chat to clipboard and export the conversation as a markdown file.
You can long press (iOS) or click the ellipsis at the bottom of a each message (macOS) to show the context menu with options to copy the message, select text (iOS) or delete a message.
Tap the + button to open the sheet / popover with options to select a system prompt, add file or image attachments, enable web search or adjust model parameters for this chat.