Posterino is a desktop publishing and poster design software designed specifically for macOS, renowned for its intuitive template system and powerful image layout capabilities. It allows users to easily create high-quality posters, collages, greeting cards, calendars, and other visual works, and is particularly skilled at automating photo layouts, making it very suitable for photography enthusiasts, small businesses, and home users to quickly produce professional-grade printed materials.

1. Detailed Explanation of the Core Interface and Workspace

After launching Posterino, the main interface is divided into the following core areas:

Top Menu Bar and Toolbar: Contains all main commands such as file operations, editing, view, and layout. The toolbar provides shortcut buttons for commonly used tools, such as “Add Photo,” “Add Text,” and “Choose Layout.”
Left Panel – “Inspector”: This is a dynamic panel that displays the corresponding property settings for the currently selected object (photo, text box, background, etc.), such as size, rotation, border, shadow, opacity, and more.
Central Area – Canvas/Workspace: This is the core area for designing and previewing your work. It displays the actual effect of the current page, and all elements are arranged and edited here.
Right Panel – “Templates and Content Library”:
- Templates Tab: Provides a rich selection of preset templates, organized by category (such as posters, collages, cards, calendars). Click to apply to the current project.
- Layout Tab: Provides various grid and free-form layout styles for arranging photos on the page.
- Background Tab: Includes solid color, gradient, and textured background options.
- My Photos Tab: Displays the image library imported from the “Photos” app or a folder, which can be dragged directly onto the canvas.
Bottom Panel – “Page Manager”: In multi-page documents (such as calendars), this displays thumbnails of all pages for adding, deleting, and navigating between pages.

II. Complete Workflow: From Creation to Export

Step 1: Create or Open a Project

Method: After launching the software, a template selection window will automatically pop up. You can also create a new project via the menu bar File → New (shortcut Cmd + N).

Action: In the “Templates” panel on the right, select a category (such as “Collage”), then double-click the thumbnail of your desired template to create a new document based on it.

Step 2: Import and Arrange Photos

Method: Add photos to layout frames.

In the “My Photos” tab on the right, find and select the photos you want to use.
Drag the photos directly into a specific image placeholder frame on the canvas, and the software will automatically fit them. Alternatively, drag a photo onto a blank area of the canvas, and Posterino will create a new image frame for it.
Click any photo on the canvas, and control handles will appear around it. Drag the handles to crop the photo, drag the corners to rotate it, and use the “Inspector” panel to precisely adjust the border, inner and outer spacing, and more.

Shortcut tips: After selecting a photo, press the Delete key to remove it; hold the Cmd key to select multiple items; use the arrow keys to fine-tune the position.

Step 3: Edit text

Method: Modify or add text.

Double-click the template’s built-in text boxes on the canvas (such as “Title Text”) and directly enter or paste your text.
To add a new text box, click the “Text” button in the toolbar (the “T” icon) or use the menu Insert → Text, then click and drag on the canvas to create a text box.
Select the text box, and in the “Inspector” panel on the left, you can change the font, font size, color, alignment, line spacing, and all other text properties.

Step 4: Adjust layout and background

Method: Optimize the overall design.

Change layout: Go to the “Layout” tab on the right and choose different grid styles. Click to apply to the current page or all pages.
Change background: Go to the “Background” tab on the right and choose a solid color, gradient, or texture. Double-click to apply, or adjust the details in the “Inspector.”
Adjust Page Settings: Use the menu File → Page Setup... (Cmd + Shift + P) to modify document size, orientation, and resolution.

Step 5: Final Export and Sharing

Method: Export your work.

After completing your design, open the export dialog via the menu File → Export... (shortcut Cmd + E).
In the export dialog, configure the following key options:
- Format: Typically choose PDF (for printing) or JPEG (for screen sharing).
- Quality/Resolution: Adjust based on your use case. Printing requires high resolution (e.g., 300 DPI).
- Destination Folder: Choose where to save the file.
Click the “Export” button to complete the operation.

You can also use File → Print... (Cmd + P) to send directly to a printer.

III. Advanced Tips for Common Features

Batch Replace Photos: If you are satisfied with the current layout and only want to swap photos, simply drag a new photo from your “Photos” library directly onto the old photo to replace it, keeping the layout and style unchanged.
Use the “Align To” Feature: Under the Arrange menu, there is an “Align To” option that lets you enable alignment to guides, grid, or other objects, making precise layout easier.
Create Custom Templates: Save your satisfactory designs as templates. Once done, use File → Save as Template..., give it a name and select a category, and you can then directly access it from the template library in the future.
Advanced Photo Cropping: After selecting a photo, in the “Image” section of the “Inspector,” you can use the “Scale” and “Pan” sliders or drag directly on the canvas to achieve non-destructive free-form cropping, with the ability to restore the original image at any time.
Object Layer Management: Use Arrange → Bring to Front (Cmd + Shift + ]) or Send to Back (Cmd + Shift + [) to adjust the stacking order of objects such as images and text boxes.

IV. Common Issues and Solutions

Issue 1: Imported photos are blurry or pixelated.
Solution: This is usually caused by the original photo resolution being too low or improper export settings. Ensure the imported photo itself is large enough in size. When exporting, check and increase the output resolution (e.g., set it to 300 DPI).

Issue 2: Unable to move text or objects to precise positions.
Solution: Enable smart guides. Go to Posterino → Preferences... → General and make sure “Show Guides” is checked. When moving objects, guides will automatically appear to assist with alignment.

Issue 3: After applying a new layout or template, the original content becomes disordered or lost.
Solution: Posterino’s layouts and templates are replaced as a whole. Before applying, it is recommended to duplicate the current page first (Edit → Duplicate Page) as a backup. Alternatively, use the styles in the “Layout” tab, which usually only change the arrangement of photo frames and have less impact on text.

Issue 4: The printed colors differ from what is displayed on screen.
Solution: This is a color management issue. Make sure the correct printer and paper profile are selected in File → Page Setup.... For professional output, it is recommended to embed a color profile when exporting to PDF and confirm the color standard with your print vendor.

V. Posterino for Mac Keyboard Shortcuts Summary

Function	Shortcut	Description
New Document	`Cmd + N`	Create a new project based on a template
Open Document	`Cmd + O`	Open an existing Posterino project
Save Document	`Cmd + S`	Save the current project
Export	`Cmd + E`	Open the export dialog
Print	`Cmd + P`	Open the print dialog
Page Setup	`Cmd + Shift + P`	Adjust document size and orientation
Copy	`Cmd + C`	Copy the selected object
Paste	`Cmd + V`	Paste the object
Delete	`Delete`	Remove the selected object
Undo	`Cmd + Z`	Undo the previous action
Redo	`Cmd + Shift + Z`	Redo the undone action
Select All	`Cmd + A`	Select all objects on the canvas
Bring to Front	`Cmd + Shift + ]`	Place the selected object on the top layer
Send to Back	`Cmd + Shift + [`	Place the selected object on the bottom layer
Zoom In	`Cmd + +`	Enlarge the canvas view
Zoom Out	`Cmd + -`	Reduce the canvas view
Actual Size	`Cmd + 0`	View the canvas at 100% scale
Show/Hide Inspector	`Cmd + Option + I`	Toggle the left properties panel
Add New Page	`Cmd + Option + N`	Add a new page at the end of a multi-page document