Yes, you can add a drop shadow in InDesign. To do so, you'll need to begin by selecting the object or text that you'd like to add a drop shadow to. From there, click on the Effects icon in the top menu bar. You should see a drop down list of effects that you can apply to the selected object or text, one of which will be the drop shadow. Click on this, and a dialogue box will open for you to make further adjustments to the look of the drop shadow. In this dialogue box you can adjust the settings for color, opacity, blur, angle, etc. to achieve the desired drop shadow look. If you're unsure of what settings to use, you can create a few test versions until you get the desired look.